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statistics: add AnalysisPriorityQueueV2
Signed-off-by: Rustin170506 <[email protected]>
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102 changes: 102 additions & 0 deletions
102
pkg/statistics/handle/autoanalyze/priorityqueue/queue2.go
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,102 @@ | ||
| // 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. | ||
|
|
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| package priorityqueue | ||
|
|
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| import ( | ||
| "context" | ||
| "sync/atomic" | ||
| "time" | ||
|
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| "github.com/pingcap/tidb/pkg/statistics" | ||
| "github.com/pingcap/tidb/pkg/statistics/handle/autoanalyze/internal/heap" | ||
| "github.com/pingcap/tidb/pkg/statistics/handle/types" | ||
| "github.com/pingcap/tidb/pkg/util" | ||
| ) | ||
|
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| // AnalysisPriorityQueueV2 is a priority queue for TableAnalysisJobs. | ||
| type AnalysisPriorityQueueV2 struct { | ||
| inner *heap.Heap[int64, AnalysisJob] | ||
|
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| ctx context.Context | ||
| cancel context.CancelFunc | ||
| wg util.WaitGroupWrapper | ||
| statsCache types.StatsCache | ||
| // lastDMLUpdateFetchTimestamp is the timestamp of the last DML update fetch. | ||
| lastDMLUpdateFetchTimestamp atomic.Uint64 | ||
| } | ||
|
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| // NewAnalysisPriorityQueue2 creates a new AnalysisPriorityQueue2. | ||
| func NewAnalysisPriorityQueue2(statsCache types.StatsCache) *AnalysisPriorityQueueV2 { | ||
| keyFunc := func(job AnalysisJob) (int64, error) { | ||
| return job.GetTableID(), nil | ||
| } | ||
| lessFunc := func(a, b AnalysisJob) bool { | ||
| return a.GetWeight() > b.GetWeight() | ||
| } | ||
| ctx, cancel := context.WithCancel(context.Background()) | ||
| pq := &AnalysisPriorityQueueV2{ | ||
| ctx: ctx, | ||
| cancel: cancel, | ||
| statsCache: statsCache, | ||
| inner: heap.NewHeap(keyFunc, lessFunc), | ||
| } | ||
|
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| pq.wg.Run(pq.run) | ||
| return pq | ||
| } | ||
|
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| func (pq *AnalysisPriorityQueueV2) run() { | ||
| fetchInterval := time.NewTicker(time.Minute * 5) | ||
| defer fetchInterval.Stop() | ||
|
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| for { | ||
| select { | ||
| case <-pq.ctx.Done(): | ||
| return | ||
| case <-fetchInterval.C: | ||
| pq.fetchDMLUpdate() | ||
| } | ||
| } | ||
| } | ||
|
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| func (pq *AnalysisPriorityQueueV2) fetchDMLUpdate() { | ||
| values := pq.statsCache.Values() | ||
| lastFetchTimestamp := pq.lastDMLUpdateFetchTimestamp.Load() | ||
| var newMaxVersion uint64 | ||
|
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| for _, value := range values { | ||
| if value.Version > lastFetchTimestamp { | ||
| // Handle the table stats | ||
| pq.handleTableStats(value) | ||
| } | ||
| newMaxVersion = max(newMaxVersion, value.Version) | ||
| } | ||
|
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| // Only update if we've seen a newer version | ||
| if newMaxVersion > lastFetchTimestamp { | ||
| pq.lastDMLUpdateFetchTimestamp.Store(newMaxVersion) | ||
| } | ||
| } | ||
|
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| func (pq *AnalysisPriorityQueueV2) handleTableStats(stats *statistics.Table) { | ||
| // TODO: Implement the logic to handle table stats | ||
| // This might include updating the priority queue based on the new stats | ||
| } | ||
|
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| func (pq *AnalysisPriorityQueueV2) Close() { | ||
| pq.cancel() | ||
| pq.wg.Wait() | ||
| pq.inner.Close() | ||
| } |