*: Revert "#19008" and "#18788"

config/config.go

@@ -55,8 +55,6 @@ const (
 	DefIndexLimit = 64
 	// DefMaxOfIndexLimit is the maximum limitation of index on a single table for TiDB.
 	DefMaxOfIndexLimit = 64 * 8
-	// DefMinQuotaStatistics is the minimum statistic memory quota(in bytes).
-	DefMinQuotaStatistics = 32 << 30
 	// DefPort is the default port of TiDB
 	DefPort = 4000
 	// DefStatusPort is the default status port of TiDB
@@ -105,7 +103,6 @@ type Config struct {
 	TempStoragePath             string `toml:"tmp-storage-path" json:"tmp-storage-path"`
 	OOMAction                   string `toml:"oom-action" json:"oom-action"`
 	MemQuotaQuery               int64  `toml:"mem-quota-query" json:"mem-quota-query"`
-	MemQuotaStatistics          int64  `toml:"mem-quota-statistics" json:"mem-quota-statistics"`
 	NestedLoopJoinCacheCapacity int64  `toml:"nested-loop-join-cache-capacity" json:"nested-loop-join-cache-capacity"`
 	// TempStorageQuota describe the temporary storage Quota during query exector when OOMUseTmpStorage is enabled
 	// If the quota exceed the capacity of the TempStoragePath, the tidb-server would exit with fatal error
@@ -644,7 +641,6 @@ var defaultConf = Config{
 	TempStoragePath:              tempStorageDirName,
 	OOMAction:                    OOMActionCancel,
 	MemQuotaQuery:                1 << 30,
-	MemQuotaStatistics:           32 << 30,
 	NestedLoopJoinCacheCapacity:  20971520,
 	EnableStreaming:              false,
 	EnableBatchDML:               false,
@@ -1002,9 +998,6 @@ func (c *Config) Valid() error {
 	if c.PreparedPlanCache.MemoryGuardRatio < 0 || c.PreparedPlanCache.MemoryGuardRatio > 1 {
 		return fmt.Errorf("memory-guard-ratio in [prepared-plan-cache] must be NOT less than 0 and more than 1")
 	}
-	if c.MemQuotaStatistics < DefMinQuotaStatistics {
-		return fmt.Errorf("memory-quota-statistics should be greater than %dB", DefMinQuotaStatistics)
-	}
 	if len(c.IsolationRead.Engines) < 1 {
 		return fmt.Errorf("the number of [isolation-read]engines for isolation read should be at least 1")
 	}

config/config.toml.example

@@ -34,10 +34,6 @@ token-limit = 1000
 # The maximum memory available for a single SQL statement. Default: 1GB
 mem-quota-query = 1073741824
 
-# The maximum memory limitation for statistics. Default: 32GB
-# This value must not be less than 32GB.
-mem-quota-statistics = 34359738368
-
 # The maximum number available of a NLJ cache for a single SQL statement. Default: 20MB
 nested-loop-join-cache-capacity = 20971520
 

config/config_test.go

@@ -188,7 +188,6 @@ server-version = "test_version"
 repair-mode = true
 max-server-connections = 200
 mem-quota-query = 10000
-mem-quota-statistics = 10000
 nested-loop-join-cache-capacity = 100
 max-index-length = 3080
 index-limit = 70
@@ -261,7 +260,6 @@ spilled-file-encryption-method = "plaintext"
 	c.Assert(conf.RepairMode, Equals, true)
 	c.Assert(conf.MaxServerConnections, Equals, uint32(200))
 	c.Assert(conf.MemQuotaQuery, Equals, int64(10000))
-	c.Assert(conf.MemQuotaStatistics, Equals, int64(10000))
 	c.Assert(conf.NestedLoopJoinCacheCapacity, Equals, int64(100))
 	c.Assert(conf.IsolationRead.Engines, DeepEquals, []string{"tiflash"})
 	c.Assert(conf.MaxIndexLength, Equals, 3080)

config/config_util_test.go

@@ -56,7 +56,6 @@ func (s *testConfigSuite) TestMergeConfigItems(c *C) {
 	newConf.Performance.PseudoEstimateRatio = 123
 	newConf.OOMAction = "panic"
 	newConf.MemQuotaQuery = 123
-	newConf.MemQuotaStatistics = 123
 	newConf.TiKVClient.StoreLimit = 123
 
 	// rejected
@@ -67,7 +66,7 @@ func (s *testConfigSuite) TestMergeConfigItems(c *C) {
 
 	as, rs := MergeConfigItems(oldConf, newConf)
 	c.Assert(len(as), Equals, 10)
-	c.Assert(len(rs), Equals, 4)
+	c.Assert(len(rs), Equals, 3)
 	for _, a := range as {
 		_, ok := dynamicConfigItems[a]
 		c.Assert(ok, IsTrue)

executor/analyze_test.go

@@ -197,14 +197,14 @@ func (s *testSuite1) TestAnalyzeParameters(c *C) {
 	c.Assert(width, Equals, int32(4))
 
 	// Test very large cmsketch
-	tk.MustExec(fmt.Sprintf("analyze table t with %d cmsketch width, %d cmsketch depth", statistics.CMSketchSizeLimit, 1))
+	tk.MustExec(fmt.Sprintf("analyze table t with %d cmsketch width, %d cmsketch depth", core.CMSketchSizeLimit, 1))
 	tbl = s.dom.StatsHandle().GetTableStats(tableInfo)
 	col = tbl.Columns[1]
 	c.Assert(col.Len(), Equals, 20)
 	c.Assert(len(col.TopN.TopN), Equals, 1)
 	width, depth = col.CMSketch.GetWidthAndDepth()
 	c.Assert(depth, Equals, int32(1))
-	c.Assert(width, Equals, int32(statistics.CMSketchSizeLimit))
+	c.Assert(width, Equals, int32(core.CMSketchSizeLimit))
 
 	// Test very large cmsketch
 	tk.MustExec("analyze table t with 20480 cmsketch width, 50 cmsketch depth")

executor/infoschema_reader_test.go

@@ -365,7 +365,7 @@ func (s *testInfoschemaTableSerialSuite) TestDataForTableStatsField(c *C) {
 	defer func() { executor.TableStatsCacheExpiry = oldExpiryTime }()
 	do := s.dom
 	h := do.StatsHandle()
-	h.Clear4Test()
+	h.Clear()
 	is := do.InfoSchema()
 	tk := testkit.NewTestKit(c, s.store)
 
@@ -414,7 +414,7 @@ func (s *testInfoschemaTableSerialSuite) TestPartitionsTable(c *C) {
 	defer func() { executor.TableStatsCacheExpiry = oldExpiryTime }()
 	do := s.dom
 	h := do.StatsHandle()
-	h.Clear4Test()
+	h.Clear()
 	is := do.InfoSchema()
 
 	tk := testkit.NewTestKit(c, s.store)

executor/simple_test.go

@@ -600,7 +600,7 @@ func (s *testSuite3) TestDropStats(c *C) {
 	c.Assert(err, IsNil)
 	tableInfo := tbl.Meta()
 	h := do.StatsHandle()
-	h.Clear4Test()
+	h.Clear()
 	testKit.MustExec("analyze table t")
 	statsTbl := h.GetTableStats(tableInfo)
 	c.Assert(statsTbl.Pseudo, IsFalse)

planner/core/cbo_test.go

@@ -496,7 +496,7 @@ func (s *testAnalyzeSuite) TestNullCount(c *C) {
 		testKit.MustQuery(input[i]).Check(testkit.Rows(output[i]...))
 	}
 	h := dom.StatsHandle()
-	h.Clear4Test()
+	h.Clear()
 	c.Assert(h.Update(dom.InfoSchema()), IsNil)
 	for i := 2; i < 4; i++ {
 		s.testData.OnRecord(func() {
@@ -552,7 +552,7 @@ func (s *testAnalyzeSuite) TestInconsistentEstimation(c *C) {
 	tk.MustExec("analyze table t with 2 buckets")
 	// Force using the histogram to estimate.
 	tk.MustExec("update mysql.stats_histograms set stats_ver = 0")
-	dom.StatsHandle().Clear4Test()
+	dom.StatsHandle().Clear()
 	dom.StatsHandle().Update(dom.InfoSchema())
 	// Using the histogram (a, b) to estimate `a = 5` will get 1.22, while using the CM Sketch to estimate
 	// the `a = 5 and c = 5` will get 10, it is not consistent.

planner/core/find_best_task.go

@@ -1246,7 +1246,7 @@ func getColumnRangeCounts(sc *stmtctx.StatementContext, colID int64, ranges []*r
 	for i, ran := range ranges {
 		if idxID >= 0 {
 			idxHist := histColl.Indices[idxID]
-			if idxHist == nil || idxHist.IsInvalid(sc, false) {
+			if idxHist == nil || idxHist.IsInvalid(false) {
 				return nil, false
 			}
 			count, err = histColl.GetRowCountByIndexRanges(sc, idxID, []*ranger.Range{ran})

planner/core/planbuilder.go

@@ -16,6 +16,7 @@ package core
 import (
 	"bytes"
 	"context"
+	"encoding/binary"
 	"fmt"
 	"strings"
 	"time"
@@ -41,7 +42,7 @@ import (
 	"github.com/pingcap/tidb/store/tikv"
 	"github.com/pingcap/tidb/table"
 	"github.com/pingcap/tidb/types"
-	"github.com/pingcap/tidb/types/parser_driver"
+	driver "github.com/pingcap/tidb/types/parser_driver"
 	util2 "github.com/pingcap/tidb/util"
 	"github.com/pingcap/tidb/util/chunk"
 	"github.com/pingcap/tidb/util/execdetails"
@@ -1705,25 +1706,44 @@ func (b *PlanBuilder) buildAnalyzeAllIndex(as *ast.AnalyzeTableStmt, opts map[as
 	return p, nil
 }
 
+// CMSketchSizeLimit indicates the size limit of CMSketch.
+var CMSketchSizeLimit = kv.TxnEntrySizeLimit / binary.MaxVarintLen32
+
+var analyzeOptionLimit = map[ast.AnalyzeOptionType]uint64{
+	ast.AnalyzeOptNumBuckets:    1024,
+	ast.AnalyzeOptNumTopN:       1024,
+	ast.AnalyzeOptCMSketchWidth: CMSketchSizeLimit,
+	ast.AnalyzeOptCMSketchDepth: CMSketchSizeLimit,
+	ast.AnalyzeOptNumSamples:    100000,
+}
+
+var analyzeOptionDefault = map[ast.AnalyzeOptionType]uint64{
+	ast.AnalyzeOptNumBuckets:    256,
+	ast.AnalyzeOptNumTopN:       20,
+	ast.AnalyzeOptCMSketchWidth: 2048,
+	ast.AnalyzeOptCMSketchDepth: 5,
+	ast.AnalyzeOptNumSamples:    10000,
+}
+
 func handleAnalyzeOptions(opts []ast.AnalyzeOpt) (map[ast.AnalyzeOptionType]uint64, error) {
-	optMap := make(map[ast.AnalyzeOptionType]uint64, len(statistics.AnalyzeOptionDefault))
-	for key, val := range statistics.AnalyzeOptionDefault {
+	optMap := make(map[ast.AnalyzeOptionType]uint64, len(analyzeOptionDefault))
+	for key, val := range analyzeOptionDefault {
 		optMap[key] = val
 	}
 	for _, opt := range opts {
 		if opt.Type == ast.AnalyzeOptNumTopN {
-			if opt.Value > statistics.AnalyzeOptionLimit[opt.Type] {
-				return nil, errors.Errorf("value of analyze option %s should not larger than %d", ast.AnalyzeOptionString[opt.Type], statistics.AnalyzeOptionLimit[opt.Type])
+			if opt.Value > analyzeOptionLimit[opt.Type] {
+				return nil, errors.Errorf("value of analyze option %s should not larger than %d", ast.AnalyzeOptionString[opt.Type], analyzeOptionLimit[opt.Type])
 			}
 		} else {
-			if opt.Value == 0 || opt.Value > statistics.AnalyzeOptionLimit[opt.Type] {
-				return nil, errors.Errorf("value of analyze option %s should be positive and not larger than %d", ast.AnalyzeOptionString[opt.Type], statistics.AnalyzeOptionLimit[opt.Type])
+			if opt.Value == 0 || opt.Value > analyzeOptionLimit[opt.Type] {
+				return nil, errors.Errorf("value of analyze option %s should be positive and not larger than %d", ast.AnalyzeOptionString[opt.Type], analyzeOptionLimit[opt.Type])
 			}
 		}
 		optMap[opt.Type] = opt.Value
 	}
-	if optMap[ast.AnalyzeOptCMSketchWidth]*optMap[ast.AnalyzeOptCMSketchDepth] > statistics.CMSketchSizeLimit {
-		return nil, errors.Errorf("cm sketch size(depth * width) should not larger than %d", statistics.CMSketchSizeLimit)
+	if optMap[ast.AnalyzeOptCMSketchWidth]*optMap[ast.AnalyzeOptCMSketchDepth] > CMSketchSizeLimit {
+		return nil, errors.Errorf("cm sketch size(depth * width) should not larger than %d", CMSketchSizeLimit)
 	}
 	return optMap, nil
 }

sessionctx/variable/session.go

@@ -937,7 +937,6 @@ func NewSessionVars() *SessionVars {
 	}
 	vars.MemQuota = MemQuota{
 		MemQuotaQuery:               config.GetGlobalConfig().MemQuotaQuery,
-		MemQuotaStatistics:          config.GetGlobalConfig().MemQuotaStatistics,
 		NestedLoopJoinCacheCapacity: config.GetGlobalConfig().NestedLoopJoinCacheCapacity,
 
 		// The variables below do not take any effect anymore, it's remaining for compatibility.
@@ -1419,8 +1418,6 @@ func (s *SessionVars) SetSystemVar(name string, val string) error {
 		s.InitChunkSize = tidbOptPositiveInt32(val, DefInitChunkSize)
 	case TIDBMemQuotaQuery:
 		s.MemQuotaQuery = tidbOptInt64(val, config.GetGlobalConfig().MemQuotaQuery)
-	case TIDBMemQuotaStatistics:
-		s.MemQuotaStatistics = tidbOptInt64(val, config.GetGlobalConfig().MemQuotaStatistics)
 	case TIDBNestedLoopJoinCacheCapacity:
 		s.NestedLoopJoinCacheCapacity = tidbOptInt64(val, config.GetGlobalConfig().NestedLoopJoinCacheCapacity)
 	case TIDBMemQuotaHashJoin:
@@ -1936,8 +1933,7 @@ func (c *Concurrency) UnionConcurrency() int {
 type MemQuota struct {
 	// MemQuotaQuery defines the memory quota for a query.
 	MemQuotaQuery int64
-	// MemQuotaStatistics defines the memory quota for the statistic Cache.
-	MemQuotaStatistics int64
+
 	// NestedLoopJoinCacheCapacity defines the memory capacity for apply cache.
 	NestedLoopJoinCacheCapacity int64
 

sessionctx/variable/sysvar.go

@@ -999,7 +999,6 @@ var defaultSysVars = []*SysVar{
 	{Scope: ScopeGlobal | ScopeSession, Name: TiDBEnableCascadesPlanner, Value: BoolOff, Type: TypeBool},
 	{Scope: ScopeGlobal | ScopeSession, Name: TiDBEnableIndexMerge, Value: BoolOff, Type: TypeBool},
 	{Scope: ScopeSession, Name: TIDBMemQuotaQuery, Value: strconv.FormatInt(config.GetGlobalConfig().MemQuotaQuery, 10), Type: TypeInt, MinValue: -1, MaxValue: math.MaxInt64},
-	{Scope: ScopeGlobal, Name: TIDBMemQuotaStatistics, Value: strconv.FormatInt(config.GetGlobalConfig().MemQuotaStatistics, 10), Type: TypeInt, MinValue: int64(32 << 30), MaxValue: math.MaxInt64},
 	{Scope: ScopeSession, Name: TIDBMemQuotaHashJoin, Value: strconv.FormatInt(DefTiDBMemQuotaHashJoin, 10), Type: TypeInt, MinValue: -1, MaxValue: math.MaxInt64},
 	{Scope: ScopeSession, Name: TIDBMemQuotaMergeJoin, Value: strconv.FormatInt(DefTiDBMemQuotaMergeJoin, 10), Type: TypeInt, MinValue: -1, MaxValue: math.MaxInt64},
 	{Scope: ScopeSession, Name: TIDBMemQuotaSort, Value: strconv.FormatInt(DefTiDBMemQuotaSort, 10), Type: TypeInt, MinValue: -1, MaxValue: math.MaxInt64},

sessionctx/variable/tidb_vars.go

@@ -97,7 +97,6 @@ const (
 	// The following session variables controls the memory quota during query execution.
 	// "tidb_mem_quota_query":				control the memory quota of a query.
 	TIDBMemQuotaQuery               = "tidb_mem_quota_query" // Bytes.
-	TIDBMemQuotaStatistics          = "tidb_mem_quota_statistics"
 	TIDBNestedLoopJoinCacheCapacity = "tidb_nested_loop_join_cache_capacity"
 	// TODO: remove them below sometime, it should have only one Quota(TIDBMemQuotaQuery).
 	TIDBMemQuotaHashJoin          = "tidb_mem_quota_hashjoin"          // Bytes.

sessionctx/variable/varsutil_test.go

@@ -88,7 +88,6 @@ func (s *testVarsutilSuite) TestNewSessionVars(c *C) {
 	c.Assert(vars.MaxChunkSize, Equals, DefMaxChunkSize)
 	c.Assert(vars.DMLBatchSize, Equals, DefDMLBatchSize)
 	c.Assert(vars.MemQuotaQuery, Equals, config.GetGlobalConfig().MemQuotaQuery)
-	c.Assert(vars.MemQuotaStatistics, Equals, config.GetGlobalConfig().MemQuotaStatistics)
 	c.Assert(vars.MemQuotaHashJoin, Equals, int64(DefTiDBMemQuotaHashJoin))
 	c.Assert(vars.MemQuotaMergeJoin, Equals, int64(DefTiDBMemQuotaMergeJoin))
 	c.Assert(vars.MemQuotaSort, Equals, int64(DefTiDBMemQuotaSort))