config

package
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 Go to latest Published: Nov 8, 2023 License: Apache-2.0 Imports: 27 Imported by: 1

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Index

Constants

View Source 
const (
	MaxLogFileSize = 4096 // MB
	// MaxTxnEntrySize is the max value of TxnEntrySizeLimit.
	MaxTxnEntrySizeLimit = 120 * 1024 * 1024 // 120MB
	// DefTxnEntrySizeLimit is the default value of TxnEntrySizeLimit.
	DefTxnEntrySizeLimit = 6 * 1024 * 1024
	// DefTxnTotalSizeLimit is the default value of TxnTxnTotalSizeLimit.
	DefTxnTotalSizeLimit        = 100 * 1024 * 1024
	SuperLargeTxnSize    uint64 = 100 * 1024 * 1024 * 1024 * 1024 // 100T, we expect a txn can never be this large
	// DefMaxIndexLength is the maximum index length(in bytes). This value is consistent with MySQL.
	DefMaxIndexLength = 3072
	// DefMaxOfMaxIndexLength is the maximum index length(in bytes) for TiDB v3.0.7 and previous version.
	DefMaxOfMaxIndexLength = 3072 * 4
	// DefIndexLimit is the limitation of index on a single table. This value is consistent with MySQL.
	DefIndexLimit = 64
	// DefMaxOfIndexLimit is the maximum limitation of index on a single table for TiDB.
	DefMaxOfIndexLimit = 64 * 8
	// DefPort is the default port of TiDB
	DefPort = 4000
	// DefStatusPort is the default status port of TiDB
	DefStatusPort = 10080
	// DefHost is the default host of TiDB
	DefHost = "0.0.0.0"
	// DefStatusHost is the default status host of TiDB
	DefStatusHost = "0.0.0.0"
	// DefTableColumnCountLimit is limit of the number of columns in a table
	DefTableColumnCountLimit = 1017
	// DefMaxOfTableColumnCountLimit is maximum limitation of the number of columns in a table
	DefMaxOfTableColumnCountLimit = 4096
	// DefStatsLoadConcurrencyLimit is limit of the concurrency of stats-load
	DefStatsLoadConcurrencyLimit = 1
	// DefMaxOfStatsLoadConcurrencyLimit is maximum limitation of the concurrency of stats-load
	DefMaxOfStatsLoadConcurrencyLimit = 128
	// DefStatsLoadQueueSizeLimit is limit of the size of stats-load request queue
	DefStatsLoadQueueSizeLimit = 1
	// DefMaxOfStatsLoadQueueSizeLimit is maximum limitation of the size of stats-load request queue
	DefMaxOfStatsLoadQueueSizeLimit = 100000
	// DefDDLSlowOprThreshold sets log DDL operations whose execution time exceeds the threshold value.
	DefDDLSlowOprThreshold = 300
	// DefExpensiveQueryTimeThreshold indicates the time threshold of expensive query.
	DefExpensiveQueryTimeThreshold = 60
	// DefMemoryUsageAlarmRatio is the threshold triggering an alarm which the memory usage of tidb-server instance exceeds.
	DefMemoryUsageAlarmRatio = 0.8
	// DefTempDir is the default temporary directory path for TiDB.
	DefTempDir = "/tmp/tidb"
	// DefAuthTokenRefreshInterval is the default time interval to refresh tidb auth token.
	DefAuthTokenRefreshInterval = time.Hour
	// EnvVarKeyspaceName is the system env name for keyspace name.
	EnvVarKeyspaceName = "KEYSPACE_NAME"
)

Config number limitations

View Source 
const (
	SpilledFileEncryptionMethodPlaintext = "plaintext"
	SpilledFileEncryptionMethodAES128CTR = "aes128-ctr"
)

The following constants represents the valid action configurations for Security.SpilledFileEncryptionMethod. "plaintext" means encryption is disabled. NOTE: Although the values is case insensitive, we should use lower-case strings because the configuration value will be transformed to lower-case string and compared with these constants in the further usage.

View Source 
const DefRowsForSampleRate = 110000

DefRowsForSampleRate is default sample rows used to calculate samplerate.

Variables

View Source 
var (
	ValidStorage = map[string]bool{
		"mocktikv": true,
		"tikv":     true,
		"unistore": true,
	}
	// CheckTableBeforeDrop enable to execute `admin check table` before `drop table`.
	CheckTableBeforeDrop = false
)

Valid config maps

View Source 
var (

	// ConflictOptions indicates the conflict config options existing in both [instance] and other sections in config file.
	ConflictOptions []InstanceConfigSection

	// DeprecatedOptions indicates the config options existing in some other sections in config file.
	// They should be moved to [instance] section.
	DeprecatedOptions []InstanceConfigSection

	// TikvConfigLock protects against concurrent tikv config refresh
	TikvConfigLock sync.Mutex
)
View Source 
var TableLockDelayClean = func() uint64 {
	return GetGlobalConfig().DelayCleanTableLock
}

TableLockDelayClean uses to get the time of delay clean table lock.

Functions

func ContainHiddenConfig 

func ContainHiddenConfig(s string) bool

ContainHiddenConfig checks whether it contains the configuration that needs to be hidden.

func FlattenConfigItems 

func FlattenConfigItems(nestedConfig map[string]interface{}) map[string]interface{}

FlattenConfigItems flatten this config, see more cases in the test.

func GetGlobalKeyspaceName 

func GetGlobalKeyspaceName() string

GetGlobalKeyspaceName is used to get global keyspace name from config file or command line.

func GetJSONConfig 

func GetJSONConfig() (string, error)

GetJSONConfig returns the config as JSON with hidden items removed It replaces the earlier HideConfig() which used strings.Split() in an way that didn't work for similarly named items (like enable).

func GetTxnScopeFromConfig 

func GetTxnScopeFromConfig() string

GetTxnScopeFromConfig extracts @@txn_scope value from the config.

func InitializeConfig 

func InitializeConfig(confPath string, configCheck, configStrict bool, enforceCmdArgs func(*Config))

InitializeConfig initialize the global config handler. The function enforceCmdArgs is used to merge the config file with command arguments: For example, if you start TiDB by the command "./tidb-server --port=3000", the port number should be overwritten to 3000 and ignore the port number in the config file.

func MergeConfigItems 

func MergeConfigItems(dstConf, newConf *Config) (acceptedItems, rejectedItems []string)

MergeConfigItems overwrites the dynamic config items and leaves the other items unchanged.

func RestoreFunc 

func RestoreFunc() (restore func())

RestoreFunc gets a function that restore the config to the current value.

func StoreGlobalConfig 

func StoreGlobalConfig(config *Config)

StoreGlobalConfig stores a new config to the globalConf. It mostly uses in the test to avoid some data races.

func TableLockEnabled 

func TableLockEnabled() bool

TableLockEnabled uses to check whether enabled the table lock feature.

func UpdateGlobal 

func UpdateGlobal(f func(conf *Config))

UpdateGlobal updates the global config, and provide a restore function that can be used to restore to the original.

Types

type AtomicBool 

type AtomicBool struct {
	atomicutil.Bool
}

AtomicBool is a helper type for atomic operations on a boolean value.

func NewAtomicBool 

func NewAtomicBool(v bool) *AtomicBool

NewAtomicBool creates an AtomicBool.

func (AtomicBool) MarshalText 

func (b AtomicBool) MarshalText() ([]byte, error)

MarshalText implements the encoding.TextMarshaler interface.

func (*AtomicBool) UnmarshalText 

func (b *AtomicBool) UnmarshalText(text []byte) error

UnmarshalText implements the encoding.TextUnmarshaler interface.

type Binlog 

type Binlog struct {
	Enable bool `toml:"enable" json:"enable"`
	// If IgnoreError is true, when writing binlog meets error, TiDB would
	// ignore the error.
	IgnoreError  bool   `toml:"ignore-error" json:"ignore-error"`
	WriteTimeout string `toml:"write-timeout" json:"write-timeout"`
	// Use socket file to write binlog, for compatible with kafka version tidb-binlog.
	BinlogSocket string `toml:"binlog-socket" json:"binlog-socket"`
	// The strategy for sending binlog to pump, value can be "range" or "hash" now.
	Strategy string `toml:"strategy" json:"strategy"`
}

Binlog is the config for binlog.

type ConfReloadFunc 

type ConfReloadFunc func(oldConf, newConf *Config)

ConfReloadFunc is used to reload the config to make it work.

type Config 

type Config struct {
	Host             string `toml:"host" json:"host"`
	AdvertiseAddress string `toml:"advertise-address" json:"advertise-address"`
	Port             uint   `toml:"port" json:"port"`
	Cors             string `toml:"cors" json:"cors"`
	Store            string `toml:"store" json:"store"`
	Path             string `toml:"path" json:"path"`
	Socket           string `toml:"socket" json:"socket"`
	Lease            string `toml:"lease" json:"lease"`
	SplitTable       bool   `toml:"split-table" json:"split-table"`
	TokenLimit       uint   `toml:"token-limit" json:"token-limit"`
	TempDir          string `toml:"temp-dir" json:"temp-dir"`
	TempStoragePath  string `toml:"tmp-storage-path" json:"tmp-storage-path"`
	// TempStorageQuota describe the temporary storage Quota during query exector when TiDBEnableTmpStorageOnOOM is enabled
	// If the quota exceed the capacity of the TempStoragePath, the tidb-server would exit with fatal error
	TempStorageQuota           int64                   `toml:"tmp-storage-quota" json:"tmp-storage-quota"` // Bytes
	TxnLocalLatches            tikvcfg.TxnLocalLatches `toml:"-" json:"-"`
	ServerVersion              string                  `toml:"server-version" json:"server-version"`
	VersionComment             string                  `toml:"version-comment" json:"version-comment"`
	TiDBEdition                string                  `toml:"tidb-edition" json:"tidb-edition"`
	TiDBReleaseVersion         string                  `toml:"tidb-release-version" json:"tidb-release-version"`
	KeyspaceName               string                  `toml:"keyspace-name" json:"keyspace-name"`
	Log                        Log                     `toml:"log" json:"log"`
	Instance                   Instance                `toml:"instance" json:"instance"`
	Security                   Security                `toml:"security" json:"security"`
	Status                     Status                  `toml:"status" json:"status"`
	Performance                Performance             `toml:"performance" json:"performance"`
	PreparedPlanCache          PreparedPlanCache       `toml:"prepared-plan-cache" json:"prepared-plan-cache"`
	OpenTracing                OpenTracing             `toml:"opentracing" json:"opentracing"`
	ProxyProtocol              ProxyProtocol           `toml:"proxy-protocol" json:"proxy-protocol"`
	PDClient                   tikvcfg.PDClient        `toml:"pd-client" json:"pd-client"`
	TiKVClient                 tikvcfg.TiKVClient      `toml:"tikv-client" json:"tikv-client"`
	Binlog                     Binlog                  `toml:"binlog" json:"binlog"`
	CompatibleKillQuery        bool                    `toml:"compatible-kill-query" json:"compatible-kill-query"`
	PessimisticTxn             PessimisticTxn          `toml:"pessimistic-txn" json:"pessimistic-txn"`
	MaxIndexLength             int                     `toml:"max-index-length" json:"max-index-length"`
	IndexLimit                 int                     `toml:"index-limit" json:"index-limit"`
	TableColumnCountLimit      uint32                  `toml:"table-column-count-limit" json:"table-column-count-limit"`
	GracefulWaitBeforeShutdown int                     `toml:"graceful-wait-before-shutdown" json:"graceful-wait-before-shutdown"`
	// AlterPrimaryKey is used to control alter primary key feature.
	AlterPrimaryKey bool `toml:"alter-primary-key" json:"alter-primary-key"`
	// TreatOldVersionUTF8AsUTF8MB4 is use to treat old version table/column UTF8 charset as UTF8MB4. This is for compatibility.
	// Currently not support dynamic modify, because this need to reload all old version schema.
	TreatOldVersionUTF8AsUTF8MB4 bool `toml:"treat-old-version-utf8-as-utf8mb4" json:"treat-old-version-utf8-as-utf8mb4"`
	// EnableTableLock indicate whether enable table lock.
	// TODO: remove this after table lock features stable.
	EnableTableLock     bool   `toml:"enable-table-lock" json:"enable-table-lock"`
	DelayCleanTableLock uint64 `toml:"delay-clean-table-lock" json:"delay-clean-table-lock"`
	SplitRegionMaxNum   uint64 `toml:"split-region-max-num" json:"split-region-max-num"`
	TopSQL              TopSQL `toml:"top-sql" json:"top-sql"`
	// RepairMode indicates that the TiDB is in the repair mode for table meta.
	RepairMode      bool     `toml:"repair-mode" json:"repair-mode"`
	RepairTableList []string `toml:"repair-table-list" json:"repair-table-list"`
	// IsolationRead indicates that the TiDB reads data from which isolation level(engine and label).
	IsolationRead IsolationRead `toml:"isolation-read" json:"isolation-read"`
	// NewCollationsEnabledOnFirstBootstrap indicates if the new collations are enabled, it effects only when a TiDB cluster bootstrapped on the first time.
	NewCollationsEnabledOnFirstBootstrap bool `toml:"new_collations_enabled_on_first_bootstrap" json:"new_collations_enabled_on_first_bootstrap"`
	// Experimental contains parameters for experimental features.
	Experimental Experimental `toml:"experimental" json:"experimental"`
	// SkipRegisterToDashboard tells TiDB don't register itself to the dashboard.
	SkipRegisterToDashboard bool `toml:"skip-register-to-dashboard" json:"skip-register-to-dashboard"`
	// EnableTelemetry enables the usage data report to PingCAP.
	EnableTelemetry bool `toml:"enable-telemetry" json:"enable-telemetry"`
	// Labels indicates the labels set for the tidb server. The labels describe some specific properties for the tidb
	// server like `zone`/`rack`/`host`. Currently, labels won't affect the tidb server except for some special
	// label keys. Now we have following special keys:
	// 1. 'group' is a special label key which should be automatically set by tidb-operator. We don't suggest
	// users to set 'group' in labels.
	// 2. 'zone' is a special key that indicates the DC location of this tidb-server. If it is set, the value for this
	// key will be the default value of the session variable `txn_scope` for this tidb-server.
	Labels map[string]string `toml:"labels" json:"labels"`
	// EnableGlobalIndex enables creating global index.
	EnableGlobalIndex bool `toml:"enable-global-index" json:"enable-global-index"`
	// DeprecateIntegerDisplayWidth indicates whether deprecating the max display length for integer.
	DeprecateIntegerDisplayWidth bool `toml:"deprecate-integer-display-length" json:"deprecate-integer-display-length"`
	// EnableEnumLengthLimit indicates whether the enum/set element length is limited.
	// According to MySQL 8.0 Refman:
	// The maximum supported length of an individual SET element is M <= 255 and (M x w) <= 1020,
	// where M is the element literal length and w is the number of bytes required for the maximum-length character in the character set.
	// See https://dev.mysql.com/doc/refman/8.0/en/string-type-syntax.html for more details.
	EnableEnumLengthLimit bool `toml:"enable-enum-length-limit" json:"enable-enum-length-limit"`
	// StoresRefreshInterval indicates the interval of refreshing stores info, the unit is second.
	StoresRefreshInterval uint64 `toml:"stores-refresh-interval" json:"stores-refresh-interval"`
	// EnableTCP4Only enables net.Listen("tcp4",...)
	// Note that: it can make lvs with toa work and thus tidb can get real client ip.
	EnableTCP4Only bool `toml:"enable-tcp4-only" json:"enable-tcp4-only"`
	// The client will forward the requests through the follower
	// if one of the following conditions happens:
	// 1. there is a network partition problem between TiDB and PD leader.
	// 2. there is a network partition problem between TiDB and TiKV leader.
	EnableForwarding bool `toml:"enable-forwarding" json:"enable-forwarding"`
	// MaxBallastObjectSize set the max size of the ballast object, the unit is byte.
	// The default value is the smallest of the following two values: 2GB or
	// one quarter of the total physical memory in the current system.
	MaxBallastObjectSize int `toml:"max-ballast-object-size" json:"max-ballast-object-size"`
	// BallastObjectSize set the initial size of the ballast object, the unit is byte.
	BallastObjectSize int `toml:"ballast-object-size" json:"ballast-object-size"`
	// EnableGlobalKill indicates whether to enable global kill.
	TrxSummary       TrxSummary `toml:"transaction-summary" json:"transaction-summary"`
	EnableGlobalKill bool       `toml:"enable-global-kill" json:"enable-global-kill"`
	// InitializeSQLFile is a file that will be executed after first bootstrap only.
	// It can be used to set GLOBAL system variable values
	InitializeSQLFile string `toml:"initialize-sql-file" json:"initialize-sql-file"`

	// EnableBatchDML, MemQuotaQuery, OOMAction unused since bootstrap v90
	EnableBatchDML bool   `toml:"enable-batch-dml" json:"enable-batch-dml"`
	MemQuotaQuery  int64  `toml:"mem-quota-query" json:"mem-quota-query"`
	OOMAction      string `toml:"oom-action" json:"oom-action"`

	// OOMUseTmpStorage unused since bootstrap v93
	OOMUseTmpStorage bool `toml:"oom-use-tmp-storage" json:"oom-use-tmp-storage"`

	// These items are deprecated because they are turned into instance system variables.
	CheckMb4ValueInUTF8        AtomicBool `toml:"check-mb4-value-in-utf8" json:"check-mb4-value-in-utf8"`
	EnableCollectExecutionInfo bool       `toml:"enable-collect-execution-info" json:"enable-collect-execution-info"`
	Plugin                     Plugin     `toml:"plugin" json:"plugin"`
	MaxServerConnections       uint32     `toml:"max-server-connections" json:"max-server-connections"`
	RunDDL                     bool       `toml:"run-ddl" json:"run-ddl"`

	// These configs are related to disaggregated-tiflash mode.
	DisaggregatedTiFlash         bool   `toml:"disaggregated-tiflash" json:"disaggregated-tiflash"`
	TiFlashComputeAutoScalerType string `toml:"autoscaler-type" json:"autoscaler-type"`
	TiFlashComputeAutoScalerAddr string `toml:"autoscaler-addr" json:"autoscaler-addr"`
	IsTiFlashComputeFixedPool    bool   `toml:"is-tiflashcompute-fixed-pool" json:"is-tiflashcompute-fixed-pool"`
	AutoScalerClusterID          string `toml:"autoscaler-cluster-id" json:"autoscaler-cluster-id"`
	UseAutoScaler                bool   `toml:"use-autoscaler" json:"use-autoscaler"`

	// TiDBMaxReuseChunk indicates max cached chunk num
	TiDBMaxReuseChunk uint32 `toml:"tidb-max-reuse-chunk" json:"tidb-max-reuse-chunk"`
	// TiDBMaxReuseColumn indicates max cached column num
	TiDBMaxReuseColumn uint32 `toml:"tidb-max-reuse-column" json:"tidb-max-reuse-column"`
	// TiDBEnableExitCheck indicates whether exit-checking in domain for background process
	TiDBEnableExitCheck bool `toml:"tidb-enable-exit-check" json:"tidb-enable-exit-check"`
}

Config contains configuration options.

func CloneConf 

func CloneConf(conf *Config) (*Config, error)

CloneConf deeply clones this config.

func GetGlobalConfig 

func GetGlobalConfig() *Config

GetGlobalConfig returns the global configuration for this server. It should store configuration from command line and configuration file. Other parts of the system can read the global configuration use this function.

func NewConfig 

func NewConfig() *Config

NewConfig creates a new config instance with default value.

func (*Config) GetTiKVConfig 

func (c *Config) GetTiKVConfig() *tikvcfg.Config

GetTiKVConfig returns configuration options from tikvcfg

func (*Config) Load 

func (c *Config) Load(confFile string) error

Load loads config options from a toml file.

func (*Config) RemovedVariableCheck 

func (c *Config) RemovedVariableCheck(confFile string) error

RemovedVariableCheck checks if the config file contains any items which have been removed. These will not take effect any more.

func (*Config) UpdateTempStoragePath 

func (c *Config) UpdateTempStoragePath()

UpdateTempStoragePath is to update the `TempStoragePath` if port/statusPort was changed and the `tmp-storage-path` was not specified in the conf.toml or was specified the same as the default value.

func (*Config) Valid 

func (c *Config) Valid() error

Valid checks if this config is valid.

type ErrConfigInstanceSection 

type ErrConfigInstanceSection struct {
	// contains filtered or unexported fields
}

ErrConfigInstanceSection error is used to warning the user which config options should be moved to 'instance'.

func (*ErrConfigInstanceSection) Error 

func (e *ErrConfigInstanceSection) Error() string

type ErrConfigValidationFailed 

type ErrConfigValidationFailed struct {
	UndecodedItems []string
	// contains filtered or unexported fields
}

The ErrConfigValidationFailed error is used so that external callers can do a type assertion to defer handling of this specific error when someone does not want strict type checking. This is needed only because logging hasn't been set up at the time we parse the config file. This should all be ripped out once strict config checking is made the default behavior.

func (*ErrConfigValidationFailed) Error 

func (e *ErrConfigValidationFailed) Error() string

type Experimental 

type Experimental struct {
	// Whether enable creating expression index.
	AllowsExpressionIndex bool `toml:"allow-expression-index" json:"allow-expression-index"`
	// Whether enable charset feature.
	EnableNewCharset bool `toml:"enable-new-charset" json:"-"`
}

Experimental controls the features that are still experimental: their semantics, interfaces are subject to change. Using these features in the production environment is not recommended.

type Instance 

type Instance struct {

	// TiDBGeneralLog is used to log every query in the server in info level.
	TiDBGeneralLog bool `toml:"tidb_general_log" json:"tidb_general_log"`
	// EnablePProfSQLCPU is used to add label sql label to pprof result.
	EnablePProfSQLCPU bool `toml:"tidb_pprof_sql_cpu" json:"tidb_pprof_sql_cpu"`
	// DDLSlowOprThreshold sets log DDL operations whose execution time exceeds the threshold value.
	DDLSlowOprThreshold uint32 `toml:"ddl_slow_threshold" json:"ddl_slow_threshold"`
	// ExpensiveQueryTimeThreshold indicates the time threshold of expensive query.
	ExpensiveQueryTimeThreshold uint64 `toml:"tidb_expensive_query_time_threshold" json:"tidb_expensive_query_time_threshold"`
	// StmtSummaryEnablePersistent indicates whether to enable file persistence for stmtsummary.
	StmtSummaryEnablePersistent bool `toml:"tidb_stmt_summary_enable_persistent" json:"tidb_stmt_summary_enable_persistent"`
	// StmtSummaryFilename indicates the file name written by stmtsummary
	// when StmtSummaryEnablePersistent is true.
	StmtSummaryFilename string `toml:"tidb_stmt_summary_filename" json:"tidb_stmt_summary_filename"`
	// StmtSummaryFileMaxDays indicates how many days the files written by
	// stmtsummary will be kept when StmtSummaryEnablePersistent is true.
	StmtSummaryFileMaxDays int `toml:"tidb_stmt_summary_file_max_days" json:"tidb_stmt_summary_file_max_days"`
	// StmtSummaryFileMaxSize indicates the maximum size (in mb) of a single file
	// written by stmtsummary when StmtSummaryEnablePersistent is true.
	StmtSummaryFileMaxSize int `toml:"tidb_stmt_summary_file_max_size" json:"tidb_stmt_summary_file_max_size"`
	// StmtSummaryFileMaxBackups indicates the maximum number of files written
	// by stmtsummary when StmtSummaryEnablePersistent is true.
	StmtSummaryFileMaxBackups int `toml:"tidb_stmt_summary_file_max_backups" json:"tidb_stmt_summary_file_max_backups"`

	EnableSlowLog         AtomicBool `toml:"tidb_enable_slow_log" json:"tidb_enable_slow_log"`
	SlowThreshold         uint64     `toml:"tidb_slow_log_threshold" json:"tidb_slow_log_threshold"`
	RecordPlanInSlowLog   uint32     `toml:"tidb_record_plan_in_slow_log" json:"tidb_record_plan_in_slow_log"`
	CheckMb4ValueInUTF8   AtomicBool `toml:"tidb_check_mb4_value_in_utf8" json:"tidb_check_mb4_value_in_utf8"`
	ForcePriority         string     `toml:"tidb_force_priority" json:"tidb_force_priority"`
	MemoryUsageAlarmRatio float64    `toml:"tidb_memory_usage_alarm_ratio" json:"tidb_memory_usage_alarm_ratio"`
	// EnableCollectExecutionInfo enables the TiDB to collect execution info.
	EnableCollectExecutionInfo AtomicBool `toml:"tidb_enable_collect_execution_info" json:"tidb_enable_collect_execution_info"`
	PluginDir                  string     `toml:"plugin_dir" json:"plugin_dir"`
	PluginLoad                 string     `toml:"plugin_load" json:"plugin_load"`
	// MaxConnections is the maximum permitted number of simultaneous client connections.
	MaxConnections    uint32     `toml:"max_connections" json:"max_connections"`
	TiDBEnableDDL     AtomicBool `toml:"tidb_enable_ddl" json:"tidb_enable_ddl"`
	TiDBRCReadCheckTS bool       `toml:"tidb_rc_read_check_ts" json:"tidb_rc_read_check_ts"`
}

Instance is the section of instance scope system variables.

type InstanceConfigSection 

type InstanceConfigSection struct {
	// SectionName indicates the origin section name.
	SectionName string
	// NameMappings maps the origin name to the name in [instance].
	NameMappings map[string]string
}

InstanceConfigSection indicates a config session that has options moved to [instance] session.

type IsolationRead 

type IsolationRead struct {
	// Engines filters tidb-server access paths by engine type.
	Engines []string `toml:"engines" json:"engines"`
}

IsolationRead is the config for isolation read.

type Log 

type Log struct {
	// Log level.
	Level string `toml:"level" json:"level"`
	// Log format, one of json or text.
	Format string `toml:"format" json:"format"`
	// Disable automatic timestamps in output. Deprecated: use EnableTimestamp instead.
	DisableTimestamp nullableBool `toml:"disable-timestamp" json:"disable-timestamp"`
	// EnableTimestamp enables automatic timestamps in log output.
	EnableTimestamp nullableBool `toml:"enable-timestamp" json:"enable-timestamp"`
	// DisableErrorStack stops annotating logs with the full stack error
	// message. Deprecated: use EnableErrorStack instead.
	DisableErrorStack nullableBool `toml:"disable-error-stack" json:"disable-error-stack"`
	// EnableErrorStack enables annotating logs with the full stack error
	// message.
	EnableErrorStack nullableBool `toml:"enable-error-stack" json:"enable-error-stack"`
	// File log config.
	File logutil.FileLogConfig `toml:"file" json:"file"`

	SlowQueryFile string `toml:"slow-query-file" json:"slow-query-file"`
	// ExpensiveThreshold is deprecated.
	ExpensiveThreshold uint `toml:"expensive-threshold" json:"expensive-threshold"`

	// QueryLogMaxLen unused since bootstrap v90
	QueryLogMaxLen uint64 `toml:"query-log-max-len" json:"query-log-max-len"`
	// EnableSlowLog, SlowThreshold, RecordPlanInSlowLog are deprecated.
	EnableSlowLog       AtomicBool `toml:"enable-slow-log" json:"enable-slow-log"`
	SlowThreshold       uint64     `toml:"slow-threshold" json:"slow-threshold"`
	RecordPlanInSlowLog uint32     `toml:"record-plan-in-slow-log" json:"record-plan-in-slow-log"`

	// Make tidb panic if write log operation hang in `Timeout` seconds
	Timeout int `toml:"timeout" json:"timeout"`
}

Log is the log section of config.

func (*Log) ToLogConfig 

func (l *Log) ToLogConfig() *logutil.LogConfig

ToLogConfig converts *Log to *logutil.LogConfig.

type LogBackup 

type LogBackup struct {
	Advancer logbackupconf.Config `toml:"advancer" json:"advancer"`
	Enabled  bool                 `toml:"enabled" json:"enabled"`
}

LogBackup is the config for log backup service. For now, it includes the embed advancer.

type OpenTracing 

type OpenTracing struct {
	Enable     bool                `toml:"enable" json:"enable"`
	RPCMetrics bool                `toml:"rpc-metrics" json:"rpc-metrics"`
	Sampler    OpenTracingSampler  `toml:"sampler" json:"sampler"`
	Reporter   OpenTracingReporter `toml:"reporter" json:"reporter"`
}

OpenTracing is the opentracing section of the config.

func (*OpenTracing) ToTracingConfig 

func (t *OpenTracing) ToTracingConfig() *tracing.Configuration

ToTracingConfig converts *OpenTracing to *tracing.Configuration.

type OpenTracingReporter 

type OpenTracingReporter struct {
	QueueSize           int           `toml:"queue-size" json:"queue-size"`
	BufferFlushInterval time.Duration `toml:"buffer-flush-interval" json:"buffer-flush-interval"`
	LogSpans            bool          `toml:"log-spans" json:"log-spans"`
	LocalAgentHostPort  string        `toml:"local-agent-host-port" json:"local-agent-host-port"`
}

OpenTracingReporter is the config for opentracing reporter. See https://godoc.org/github.com/uber/jaeger-client-go/config#ReporterConfig

type OpenTracingSampler 

type OpenTracingSampler struct {
	Type                    string        `toml:"type" json:"type"`
	Param                   float64       `toml:"param" json:"param"`
	SamplingServerURL       string        `toml:"sampling-server-url" json:"sampling-server-url"`
	MaxOperations           int           `toml:"max-operations" json:"max-operations"`
	SamplingRefreshInterval time.Duration `toml:"sampling-refresh-interval" json:"sampling-refresh-interval"`
}

OpenTracingSampler is the config for opentracing sampler. See https://godoc.org/github.com/uber/jaeger-client-go/config#SamplerConfig

type Performance 

type Performance struct {
	MaxProcs uint `toml:"max-procs" json:"max-procs"`
	// Deprecated: use ServerMemoryQuota instead
	MaxMemory           uint64  `toml:"max-memory" json:"max-memory"`
	ServerMemoryQuota   uint64  `toml:"server-memory-quota" json:"server-memory-quota"`
	StatsLease          string  `toml:"stats-lease" json:"stats-lease"`
	StmtCountLimit      uint    `toml:"stmt-count-limit" json:"stmt-count-limit"`
	PseudoEstimateRatio float64 `toml:"pseudo-estimate-ratio" json:"pseudo-estimate-ratio"`
	BindInfoLease       string  `toml:"bind-info-lease" json:"bind-info-lease"`
	TxnEntrySizeLimit   uint64  `toml:"txn-entry-size-limit" json:"txn-entry-size-limit"`
	TxnTotalSizeLimit   uint64  `toml:"txn-total-size-limit" json:"txn-total-size-limit"`
	TCPKeepAlive        bool    `toml:"tcp-keep-alive" json:"tcp-keep-alive"`
	TCPNoDelay          bool    `toml:"tcp-no-delay" json:"tcp-no-delay"`
	CrossJoin           bool    `toml:"cross-join" json:"cross-join"`
	DistinctAggPushDown bool    `toml:"distinct-agg-push-down" json:"distinct-agg-push-down"`
	// Whether enable projection push down for coprocessors (both tikv & tiflash), default false.
	ProjectionPushDown bool   `toml:"projection-push-down" json:"projection-push-down"`
	MaxTxnTTL          uint64 `toml:"max-txn-ttl" json:"max-txn-ttl"`
	// Deprecated
	MemProfileInterval string `toml:"-" json:"-"`

	IndexUsageSyncLease               string `toml:"index-usage-sync-lease" json:"index-usage-sync-lease"`
	PlanReplayerGCLease               string `toml:"plan-replayer-gc-lease" json:"plan-replayer-gc-lease"`
	GOGC                              int    `toml:"gogc" json:"gogc"`
	EnforceMPP                        bool   `toml:"enforce-mpp" json:"enforce-mpp"`
	StatsLoadConcurrency              uint   `toml:"stats-load-concurrency" json:"stats-load-concurrency"`
	StatsLoadQueueSize                uint   `toml:"stats-load-queue-size" json:"stats-load-queue-size"`
	AnalyzePartitionConcurrencyQuota  uint   `toml:"analyze-partition-concurrency-quota" json:"analyze-partition-concurrency-quota"`
	PlanReplayerDumpWorkerConcurrency uint   `toml:"plan-replayer-dump-worker-concurrency" json:"plan-replayer-dump-worker-concurrency"`
	EnableStatsCacheMemQuota          bool   `toml:"enable-stats-cache-mem-quota" json:"enable-stats-cache-mem-quota"`

	// CommitterConcurrency, RunAutoAnalyze unused since bootstrap v90
	CommitterConcurrency int  `toml:"committer-concurrency" json:"committer-concurrency"`
	RunAutoAnalyze       bool `toml:"run-auto-analyze" json:"run-auto-analyze"`

	// ForcePriority, MemoryUsageAlarmRatio are deprecated.
	ForcePriority         string  `toml:"force-priority" json:"force-priority"`
	MemoryUsageAlarmRatio float64 `toml:"memory-usage-alarm-ratio" json:"memory-usage-alarm-ratio"`

	EnableLoadFMSketch bool `toml:"enable-load-fmsketch" json:"enable-load-fmsketch"`

	LiteInitStats bool `toml:"lite-init-stats" json:"lite-init-stats"`

	// If ForceInitStats is true, when tidb starts up, it doesn't provide service until init stats is finished.
	// If ForceInitStats is false, tidb can provide service before init stats is finished. Note that during the period
	// of init stats the optimizer may make bad decisions due to pseudo stats.
	ForceInitStats bool `toml:"force-init-stats" json:"force-init-stats"`
}

Performance is the performance section of the config.

type PessimisticTxn 

type PessimisticTxn struct {
	// The max count of retry for a single statement in a pessimistic transaction.
	MaxRetryCount uint `toml:"max-retry-count" json:"max-retry-count"`
	// The max count of deadlock events that will be recorded in the information_schema.deadlocks table.
	DeadlockHistoryCapacity uint `toml:"deadlock-history-capacity" json:"deadlock-history-capacity"`
	// Whether retryable deadlocks (in-statement deadlocks) are collected to the information_schema.deadlocks table.
	DeadlockHistoryCollectRetryable bool `toml:"deadlock-history-collect-retryable" json:"deadlock-history-collect-retryable"`
	// PessimisticAutoCommit represents if true it means the auto-commit transactions will be in pessimistic mode.
	PessimisticAutoCommit AtomicBool `toml:"pessimistic-auto-commit" json:"pessimistic-auto-commit"`
	// ConstraintCheckInPlacePessimistic is the default value for the session variable `tidb_constraint_check_in_place_pessimistic`
	ConstraintCheckInPlacePessimistic bool `toml:"constraint-check-in-place-pessimistic" json:"constraint-check-in-place-pessimistic"`
}

PessimisticTxn is the config for pessimistic transaction.

func DefaultPessimisticTxn 

func DefaultPessimisticTxn() PessimisticTxn

DefaultPessimisticTxn returns the default configuration for PessimisticTxn

type PlanCache 

type PlanCache struct {
	Enabled  bool `toml:"enabled" json:"enabled"`
	Capacity uint `toml:"capacity" json:"capacity"`
	Shards   uint `toml:"shards" json:"shards"`
}

PlanCache is the PlanCache section of the config.

type Plugin 

type Plugin struct {
	Dir  string `toml:"dir" json:"dir"`
	Load string `toml:"load" json:"load"`
}

Plugin is the config for plugin

type PreparedPlanCache 

type PreparedPlanCache struct {
	Enabled          bool    `toml:"enabled" json:"enabled"`
	Capacity         uint    `toml:"capacity" json:"capacity"`
	MemoryGuardRatio float64 `toml:"memory-guard-ratio" json:"memory-guard-ratio"`
}

PreparedPlanCache is the PreparedPlanCache section of the config.

type ProxyProtocol 

type ProxyProtocol struct {
	// PROXY protocol acceptable client networks.
	// Empty string means disable PROXY protocol,
	// * means all networks.
	Networks string `toml:"networks" json:"networks"`
	// PROXY protocol header read timeout, Unit is second.
	HeaderTimeout uint `toml:"header-timeout" json:"header-timeout"`
	// PROXY protocol header process fallback-able.
	// If set to true and not send PROXY protocol header, connection will return connection's client IP.
	Fallbackable bool `toml:"fallbackable" json:"fallbackable"`
}

ProxyProtocol is the PROXY protocol section of the config.

type Security 

type Security struct {
	SkipGrantTable  bool     `toml:"skip-grant-table" json:"skip-grant-table"`
	SSLCA           string   `toml:"ssl-ca" json:"ssl-ca"`
	SSLCert         string   `toml:"ssl-cert" json:"ssl-cert"`
	SSLKey          string   `toml:"ssl-key" json:"ssl-key"`
	ClusterSSLCA    string   `toml:"cluster-ssl-ca" json:"cluster-ssl-ca"`
	ClusterSSLCert  string   `toml:"cluster-ssl-cert" json:"cluster-ssl-cert"`
	ClusterSSLKey   string   `toml:"cluster-ssl-key" json:"cluster-ssl-key"`
	ClusterVerifyCN []string `toml:"cluster-verify-cn" json:"cluster-verify-cn"`
	// Used for auth plugin `tidb_session_token`.
	SessionTokenSigningCert string `toml:"session-token-signing-cert" json:"session-token-signing-cert"`
	SessionTokenSigningKey  string `toml:"session-token-signing-key" json:"session-token-signing-key"`
	// If set to "plaintext", the spilled files will not be encrypted.
	SpilledFileEncryptionMethod string `toml:"spilled-file-encryption-method" json:"spilled-file-encryption-method"`
	// EnableSEM prevents SUPER users from having full access.
	EnableSEM bool `toml:"enable-sem" json:"enable-sem"`
	// Allow automatic TLS certificate generation
	AutoTLS         bool   `toml:"auto-tls" json:"auto-tls"`
	MinTLSVersion   string `toml:"tls-version" json:"tls-version"`
	RSAKeySize      int    `toml:"rsa-key-size" json:"rsa-key-size"`
	SecureBootstrap bool   `toml:"secure-bootstrap" json:"secure-bootstrap"`
	// The path of the JWKS for tidb_auth_token authentication
	AuthTokenJWKS string `toml:"auth-token-jwks" json:"auth-token-jwks"`
	// The refresh time interval of JWKS
	AuthTokenRefreshInterval string `toml:"auth-token-refresh-interval" json:"auth-token-refresh-interval"`
	// Disconnect directly when the password is expired
	DisconnectOnExpiredPassword bool `toml:"disconnect-on-expired-password" json:"disconnect-on-expired-password"`
}

Security is the security section of the config.

func (*Security) ClusterSecurity 

func (s *Security) ClusterSecurity() tikvcfg.Security

ClusterSecurity returns Security info for cluster

type Status 

type Status struct {
	StatusHost      string `toml:"status-host" json:"status-host"`
	MetricsAddr     string `toml:"metrics-addr" json:"metrics-addr"`
	StatusPort      uint   `toml:"status-port" json:"status-port"`
	MetricsInterval uint   `toml:"metrics-interval" json:"metrics-interval"`
	ReportStatus    bool   `toml:"report-status" json:"report-status"`
	RecordQPSbyDB   bool   `toml:"record-db-qps" json:"record-db-qps"`
	RecordDBLabel   bool   `toml:"record-db-label" json:"record-db-label"`
	// After a duration of this time in seconds if the server doesn't see any activity it pings
	// the client to see if the transport is still alive.
	GRPCKeepAliveTime uint `toml:"grpc-keepalive-time" json:"grpc-keepalive-time"`
	// After having pinged for keepalive check, the server waits for a duration of timeout in seconds
	// and if no activity is seen even after that the connection is closed.
	GRPCKeepAliveTimeout uint `toml:"grpc-keepalive-timeout" json:"grpc-keepalive-timeout"`
	// The number of max concurrent streams/requests on a client connection.
	GRPCConcurrentStreams uint `toml:"grpc-concurrent-streams" json:"grpc-concurrent-streams"`
	// Sets window size for stream. The default value is 2MB.
	GRPCInitialWindowSize int `toml:"grpc-initial-window-size" json:"grpc-initial-window-size"`
	// Set maximum message length in bytes that gRPC can send. `-1` means unlimited. The default value is 10MB.
	GRPCMaxSendMsgSize int `toml:"grpc-max-send-msg-size" json:"grpc-max-send-msg-size"`
}

Status is the status section of the config.

type TopSQL 

type TopSQL struct {
	// The TopSQL's data receiver address.
	ReceiverAddress string `toml:"receiver-address" json:"receiver-address"`
}

TopSQL is the config for TopSQL.

type TrxSummary 

type TrxSummary struct {
	// how many transaction summary in `transaction_summary` each TiDB node should keep.
	TransactionSummaryCapacity uint `toml:"transaction-summary-capacity" json:"transaction-summary-capacity"`
	// how long a transaction should be executed to make it be recorded in `transaction_id_digest`.
	TransactionIDDigestMinDuration uint `toml:"transaction-id-digest-min-duration" json:"transaction-id-digest-min-duration"`
}

TrxSummary is the config for transaction summary collecting.

func DefaultTrxSummary 

func DefaultTrxSummary() TrxSummary

DefaultTrxSummary returns the default configuration for TrxSummary collector

func (*TrxSummary) Valid 

func (config *TrxSummary) Valid() error

Valid Validatse TrxSummary configs

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