executor: track the memroy usage in HashJoin probe phase (pingcap#41081)

close pingcap#40500

Author: wshwsh12

executor/hash_table.go

@@ -114,7 +114,8 @@ type hashRowContainer struct {
 	memTracker   *memory.Tracker
 
 	// chkBuf buffer the data reads from the disk if rowContainer is spilled.
-	chkBuf *chunk.Chunk
+	chkBuf                *chunk.Chunk
+	chkBufSizeForOneProbe int64
 }
 
 func newHashRowContainer(sCtx sessionctx.Context, hCtx *hashContext, allTypes []*types.FieldType) *hashRowContainer {
@@ -213,6 +214,15 @@ func (c *hashRowContainer) GetAllMatchedRows(probeHCtx *hashContext, probeSideRo
 	return matched, nil
 }
 
+// signalCheckpointForJoin indicates the times of row probe that a signal detection will be triggered.
+const signalCheckpointForJoin int = 1 << 14
+
+// rowSize is the size of Row.
+const rowSize = int64(unsafe.Sizeof(chunk.Row{}))
+
+// rowPtrSize is the size of RowPtr.
+const rowPtrSize = int64(unsafe.Sizeof(chunk.RowPtr{}))
+
 // GetMatchedRowsAndPtrs get matched rows and Ptrs from probeRow. It can be called
 // in multiple goroutines while each goroutine should keep its own
 // h and buf.
@@ -225,7 +235,19 @@ func (c *hashRowContainer) GetMatchedRowsAndPtrs(probeKey uint64, probeRow chunk
 	matched = matched[:0]
 	var matchedRow chunk.Row
 	matchedPtrs = matchedPtrs[:0]
-	for _, ptr := range innerPtrs {
+
+	// Some variables used for memTracker.
+	var (
+		matchedDataSize                  = int64(cap(matched))*rowSize + int64(cap(matchedPtrs))*rowPtrSize
+		lastChunkBufPointer *chunk.Chunk = nil
+		memDelta            int64        = 0
+	)
+	c.chkBuf = nil
+	c.memTracker.Consume(-c.chkBufSizeForOneProbe + int64(cap(innerPtrs))*rowPtrSize)
+	defer c.memTracker.Consume(-int64(cap(innerPtrs))*rowPtrSize + memDelta)
+	c.chkBufSizeForOneProbe = 0
+
+	for i, ptr := range innerPtrs {
 		matchedRow, c.chkBuf, err = c.rowContainer.GetRowAndAppendToChunk(ptr, c.chkBuf)
 		if err != nil {
 			return nil, nil, err
@@ -235,6 +257,19 @@ func (c *hashRowContainer) GetMatchedRowsAndPtrs(probeKey uint64, probeRow chunk
 		if err != nil {
 			return nil, nil, err
 		}
+		if c.chkBuf != lastChunkBufPointer && lastChunkBufPointer != nil {
+			lastChunkSize := lastChunkBufPointer.MemoryUsage()
+			c.chkBufSizeForOneProbe += lastChunkSize
+			memDelta += lastChunkSize
+		}
+		lastChunkBufPointer = c.chkBuf
+		if i&signalCheckpointForJoin == 0 {
+			// Trigger Consume for checking the OOM Action signal
+			memDelta += int64(cap(matched))*rowSize + int64(cap(matchedPtrs))*rowPtrSize - matchedDataSize
+			matchedDataSize = int64(cap(matched))*rowSize + int64(cap(matchedPtrs))*rowPtrSize
+			c.memTracker.Consume(memDelta + 1)
+			memDelta = 0
+		}
 		if !ok {
 			atomic.AddInt64(&c.stat.probeCollision, 1)
 			continue

executor/join_test.go

@@ -2892,3 +2892,20 @@ func TestOuterJoin(t *testing.T) {
 		),
 	)
 }
+
+func TestCartesianJoinPanic(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("create table t(a int)")
+	tk.MustExec("insert into t values(1)")
+	tk.MustExec("set tidb_mem_quota_query = 1 << 30")
+	tk.MustExec("set global tidb_mem_oom_action = 'CANCEL'")
+	tk.MustExec("set global tidb_enable_tmp_storage_on_oom = off;")
+	for i := 0; i < 14; i++ {
+		tk.MustExec("insert into t select * from t")
+	}
+	err := tk.QueryToErr("desc analyze select * from t t1, t t2, t t3, t t4, t t5, t t6;")
+	require.NotNil(t, err)
+	require.True(t, strings.Contains(err.Error(), "Out Of Memory Quota!"))
+}