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statistics: concurrency init stats (pingcap#51403) (pingcap#52261)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,18 @@ | ||
| load("@io_bazel_rules_go//go:def.bzl", "go_library") | ||
|
|
||
| go_library( | ||
| name = "initstats", | ||
| srcs = ["load_stats.go"], | ||
| importpath = "github.com/pingcap/tidb/pkg/statistics/handle/initstats", | ||
| visibility = ["//visibility:public"], | ||
| deps = [ | ||
| "//pkg/infoschema", | ||
| "//pkg/kv", | ||
| "//pkg/statistics/handle/logutil", | ||
| "//pkg/statistics/handle/util", | ||
| "//pkg/util", | ||
| "//pkg/util/chunk", | ||
| "//pkg/util/sqlexec", | ||
| "@org_uber_go_zap//:zap", | ||
| ], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,86 @@ | ||
| // Copyright 2024 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package initstats | ||
|
|
||
| import ( | ||
| "context" | ||
| "runtime" | ||
| "sync" | ||
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| "github.com/pingcap/tidb/pkg/infoschema" | ||
| "github.com/pingcap/tidb/pkg/kv" | ||
| "github.com/pingcap/tidb/pkg/statistics/handle/logutil" | ||
| statsutil "github.com/pingcap/tidb/pkg/statistics/handle/util" | ||
| "github.com/pingcap/tidb/pkg/util" | ||
| "github.com/pingcap/tidb/pkg/util/chunk" | ||
| "github.com/pingcap/tidb/pkg/util/sqlexec" | ||
| "go.uber.org/zap" | ||
| ) | ||
|
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||
| // Worker is used to load stats concurrently. | ||
| type Worker struct { | ||
| taskFunc func(ctx context.Context, req *chunk.Chunk) error | ||
| dealFunc func(is infoschema.InfoSchema, cache statsutil.StatsCache, iter *chunk.Iterator4Chunk) | ||
| mu sync.Mutex | ||
| wg util.WaitGroupWrapper | ||
| } | ||
|
|
||
| // NewWorker creates a new Worker. | ||
| func NewWorker( | ||
| taskFunc func(ctx context.Context, req *chunk.Chunk) error, | ||
| dealFunc func(is infoschema.InfoSchema, cache statsutil.StatsCache, iter *chunk.Iterator4Chunk)) *Worker { | ||
| return &Worker{ | ||
| taskFunc: taskFunc, | ||
| dealFunc: dealFunc, | ||
| } | ||
| } | ||
|
|
||
| // LoadStats loads stats concurrently when to init stats | ||
| func (ls *Worker) LoadStats(is infoschema.InfoSchema, cache statsutil.StatsCache, rc sqlexec.RecordSet) { | ||
| concurrency := runtime.GOMAXPROCS(0) | ||
| for n := 0; n < concurrency; n++ { | ||
| ls.wg.Run(func() { | ||
| req := rc.NewChunk(nil) | ||
| ls.loadStats(is, cache, req) | ||
| }) | ||
| } | ||
| } | ||
|
|
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| func (ls *Worker) loadStats(is infoschema.InfoSchema, cache statsutil.StatsCache, req *chunk.Chunk) { | ||
| iter := chunk.NewIterator4Chunk(req) | ||
| ctx := kv.WithInternalSourceType(context.Background(), kv.InternalTxnStats) | ||
| for { | ||
| err := ls.getTask(ctx, req) | ||
| if err != nil { | ||
| logutil.StatsLogger().Error("load stats failed", zap.Error(err)) | ||
| return | ||
| } | ||
| if req.NumRows() == 0 { | ||
| return | ||
| } | ||
| ls.dealFunc(is, cache, iter) | ||
| } | ||
| } | ||
|
|
||
| func (ls *Worker) getTask(ctx context.Context, req *chunk.Chunk) error { | ||
| ls.mu.Lock() | ||
| defer ls.mu.Unlock() | ||
| return ls.taskFunc(ctx, req) | ||
| } | ||
|
|
||
| // Wait closes the load stats worker. | ||
| func (ls *Worker) Wait() { | ||
| ls.wg.Wait() | ||
| } |