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*: add memory tracker for InsertExec and ReplaceExec #14179

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merged 28 commits into from
Dec 30, 2019
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*: add memory tracker for InsertExec and ReplaceExec #14179

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*: add memory tracker for InsertExec and ReplaceExec
XuHuaiyu Dec 23, 2019
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test
XuHuaiyu Dec 23, 2019
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fix ci
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Merge branch 'master' of https://github.com/pingcap/tidb into trace-w…
XuHuaiyu Dec 24, 2019
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remove useless code
XuHuaiyu Dec 24, 2019
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refine
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remove useless code
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add some tests
XuHuaiyu Dec 24, 2019
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refine code
XuHuaiyu Dec 25, 2019
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Merge branch 'master' into trace-write-memory
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Merge branch 'trace-write-memory' of https://github.com/XuHuaiyu/tidb…
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XuHuaiyu Dec 30, 2019
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Merge branch 'master' of https://github.com/pingcap/tidb into trace-w…
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XuHuaiyu Dec 30, 2019
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@XuHuaiyu
XuHuaiyu committed Dec 26, 2019
commit 3fb96e98164bde60ae36203dd14d3d3dd971487a
5 changes: 1 addition & 4 deletions session/txn.go
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Expand Up @@ -438,10 +438,7 @@ func (s *session) getTxnFuture(ctx context.Context) *txnFuture {

// StmtCommit implements the sessionctx.Context interface.
func (s *session) StmtCommit(memTracker *memory.Tracker) error {
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@jackysp jackysp Dec 26, 2019 •
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The statement is finished and the memory is allocated when StmtCommit, I think it is meanless. Consume it at

tidb/session/txn.go

Line 260 in d666ed4

return st.buf.Set(k, v)
.

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@XuHuaiyu XuHuaiyu Dec 26, 2019 •
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But stmtBuffer can be GCed after be written to txnBuffer?

defer func() {
s.txn.cleanup()
memTracker.Consume(int64(-s.txn.Size()))
}()
defer s.txn.cleanup()
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if we follow code logic, this defer maybe need memTracker.Consume(-int64(txn.Size())), before this line we have put all data from stmt buffer into transaction buffer, and this line will cleanup stmt buffer

st := &s.txn
txnSize := st.Transaction.Size()
var count int
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