106 lines
2.6 KiB
Go
106 lines
2.6 KiB
Go
// Copyright 2024 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package workloadrepo
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import (
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"context"
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"errors"
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"strconv"
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"time"
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"github.com/pingcap/failpoint"
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"github.com/pingcap/tidb/pkg/sessionctx"
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"github.com/pingcap/tidb/pkg/util"
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"github.com/pingcap/tidb/pkg/util/logutil"
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"go.uber.org/zap"
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)
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func (w *worker) samplingTable(ctx context.Context, rt *repositoryTable) {
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_sessctx := w.getSessionWithRetry()
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defer w.sesspool.Put(_sessctx)
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sess := _sessctx.(sessionctx.Context)
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if rt.insertStmt == "" {
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if err := buildInsertQuery(ctx, sess, rt); err != nil {
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logutil.BgLogger().Info("workload repository sampling failed: could not generate insert statement", zap.String("tbl", rt.destTable), zap.NamedError("err", err))
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return
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}
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}
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if _, err := runQuery(ctx, sess, rt.insertStmt, w.instanceID); err != nil {
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logutil.BgLogger().Info("workload repository sampling failed: could not run insert statement", zap.String("tbl", rt.destTable), zap.NamedError("err", err))
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}
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}
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func (w *worker) startSample(ctx context.Context) func() {
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return func() {
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w.resetSamplingInterval(w.samplingInterval)
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for {
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select {
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case <-ctx.Done():
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return
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case <-w.samplingTicker.C:
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// sample thread
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var wg util.WaitGroupWrapper
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for rtIdx := range w.workloadTables {
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rt := &w.workloadTables[rtIdx]
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if rt.tableType != samplingTable {
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continue
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}
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wg.Run(func() {
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w.samplingTable(ctx, rt)
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})
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}
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wg.Wait()
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}
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}
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}
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}
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func (w *worker) resetSamplingInterval(newRate int32) {
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if newRate == 0 {
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w.samplingTicker.Stop()
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} else {
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w.samplingTicker.Reset(time.Duration(newRate) * time.Second)
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}
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}
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func (w *worker) changeSamplingInterval(_ context.Context, d string) error {
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n, err := strconv.Atoi(d)
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failpoint.Inject("FastRunawayGC", func() {
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err = errors.New("fake error")
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})
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if err != nil {
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return errWrongValueForVar.GenWithStackByArgs(repositorySamplingInterval, d)
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}
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w.Lock()
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defer w.Unlock()
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if int32(n) != w.samplingInterval {
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w.samplingInterval = int32(n)
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if w.samplingTicker != nil {
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w.resetSamplingInterval(w.samplingInterval)
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}
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}
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return nil
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}
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