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

executor/hash_table.go

@@ -83,6 +83,14 @@ type hashRowContainer struct {
 	hashTable baseHashTable
 
 	rowContainer *chunk.RowContainer
+<<<<<<< HEAD
+=======
+	memTracker   *memory.Tracker
+
+	// chkBuf buffer the data reads from the disk if rowContainer is spilled.
+	chkBuf                *chunk.Chunk
+	chkBufSizeForOneProbe int64
+>>>>>>> 5cb84186dc (executor: track the memroy usage in HashJoin probe phase (#41081))
 }
 
 func newHashRowContainer(sCtx sessionctx.Context, estCount int, hCtx *hashContext, allTypes []*types.FieldType) *hashRowContainer {
@@ -104,6 +112,88 @@ func (c *hashRowContainer) ShallowCopy() *hashRowContainer {
 	return &newHRC
 }
 
+<<<<<<< HEAD
+=======
+// GetMatchedRows get matched rows from probeRow. It can be called
+// in multiple goroutines while each goroutine should keep its own
+// h and buf.
+func (c *hashRowContainer) GetMatchedRows(probeKey uint64, probeRow chunk.Row, hCtx *hashContext, matched []chunk.Row) ([]chunk.Row, error) {
+	matchedRows, _, err := c.GetMatchedRowsAndPtrs(probeKey, probeRow, hCtx, matched, nil, false)
+	return matchedRows, err
+}
+
+func (c *hashRowContainer) GetAllMatchedRows(probeHCtx *hashContext, probeSideRow chunk.Row,
+	probeKeyNullBits *bitmap.ConcurrentBitmap, matched []chunk.Row, needCheckBuildRowPos, needCheckProbeRowPos []int) ([]chunk.Row, error) {
+	// for NAAJ probe row with null, we should match them with all build rows.
+	var (
+		ok        bool
+		err       error
+		innerPtrs []chunk.RowPtr
+	)
+	c.hashTable.Iter(
+		func(_ uint64, e *entry) {
+			entryAddr := e
+			for entryAddr != nil {
+				innerPtrs = append(innerPtrs, entryAddr.ptr)
+				entryAddr = entryAddr.next
+			}
+		})
+	matched = matched[:0]
+	if len(innerPtrs) == 0 {
+		return matched, nil
+	}
+	// all built bucket rows come from hash table, their bitmap are all nil (doesn't contain any null). so
+	// we could only use the probe null bits to filter valid rows.
+	if probeKeyNullBits != nil && len(probeHCtx.naKeyColIdx) > 1 {
+		// if len(probeHCtx.naKeyColIdx)=1
+		//     that means the NA-Join probe key is directly a (null) <-> (fetch all buckets), nothing to do.
+		// else like
+		//	   (null, 1, 2), we should use the not-null probe bit to filter rows. Only fetch rows like
+		//     (  ? , 1, 2), that exactly with value as 1 and 2 in the second and third join key column.
+		needCheckProbeRowPos = needCheckProbeRowPos[:0]
+		needCheckBuildRowPos = needCheckBuildRowPos[:0]
+		keyColLen := len(c.hCtx.naKeyColIdx)
+		for i := 0; i < keyColLen; i++ {
+			// since all bucket is from hash table (Not Null), so the buildSideNullBits check is eliminated.
+			if probeKeyNullBits.UnsafeIsSet(i) {
+				continue
+			}
+			needCheckBuildRowPos = append(needCheckBuildRowPos, c.hCtx.naKeyColIdx[i])
+			needCheckProbeRowPos = append(needCheckProbeRowPos, probeHCtx.naKeyColIdx[i])
+		}
+	}
+	var mayMatchedRow chunk.Row
+	for _, ptr := range innerPtrs {
+		mayMatchedRow, c.chkBuf, err = c.rowContainer.GetRowAndAppendToChunk(ptr, c.chkBuf)
+		if err != nil {
+			return nil, err
+		}
+		if probeKeyNullBits != nil && len(probeHCtx.naKeyColIdx) > 1 {
+			// check the idxs-th value of the join columns.
+			ok, err = codec.EqualChunkRow(c.sc, mayMatchedRow, c.hCtx.allTypes, needCheckBuildRowPos, probeSideRow, probeHCtx.allTypes, needCheckProbeRowPos)
+			if err != nil {
+				return nil, err
+			}
+			if !ok {
+				continue
+			}
+			// once ok. just append the (maybe) valid build row for latter other conditions check if any.
+		}
+		matched = append(matched, mayMatchedRow)
+	}
+	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{}))
+
+>>>>>>> 5cb84186dc (executor: track the memroy usage in HashJoin probe phase (#41081))
 // 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.
@@ -114,9 +204,27 @@ func (c *hashRowContainer) GetMatchedRowsAndPtrs(probeKey uint64, probeRow chunk
 	}
 	matched = make([]chunk.Row, 0, len(innerPtrs))
 	var matchedRow chunk.Row
+<<<<<<< HEAD
 	matchedPtrs = make([]chunk.RowPtr, 0, len(innerPtrs))
 	for _, ptr := range innerPtrs {
 		matchedRow, err = c.rowContainer.GetRow(ptr)
+=======
+	matchedPtrs = matchedPtrs[:0]
+
+	// 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)
+>>>>>>> 5cb84186dc (executor: track the memroy usage in HashJoin probe phase (#41081))
 		if err != nil {
 			return
 		}
@@ -125,6 +233,19 @@ func (c *hashRowContainer) GetMatchedRowsAndPtrs(probeKey uint64, probeRow chunk
 		if err != nil {
 			return
 		}
+		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

@@ -2808,3 +2808,20 @@ func (s *testSuiteJoinSerial) TestIssue37932(c *C) {
 	}
 	c.Assert(err, IsNil)
 }
+
+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!"))
+}