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server: add experimental flag for using shared buffer in transacton write

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This commit is contained in:
Wilson Wang
2021-05-04 10:11:40 -07:00
parent 56154216b7
commit 98083ea914
6 changed files with 65 additions and 53 deletions
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2
server/etcdserver/apply.go
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@@ -438,7 +438,7 @@ func (a *applierV3backend) Txn(ctx context.Context, rt *pb.TxnRequest) (*pb.TxnR
// When the transaction contains write operations, we use ReadTx instead of
// ConcurrentReadTx to avoid extra overhead of copying buffer.
var txn mvcc.TxnWrite
if isWrite {
if isWrite && a.s.Cfg.ExperimentalTxnModeWriteWithSharedBuffer {
txn = mvcc.NewReadOnlyTxnWrite(a.s.KV().Read(mvcc.SharedBufReadTxMode, trace))
} else {
txn = mvcc.NewReadOnlyTxnWrite(a.s.KV().Read(mvcc.ConcurrentReadTxMode, trace))