hcq/oceanbase
1
0
Fork 0
Code Issues Pull Requests Actions 1 Packages Projects Releases Wiki Activity

Optimize snapshot acquiring when read write statement is spliting

Browse Source
This commit is contained in:
obdev
2023-08-02 09:12:28 +00:00
committed by ob-robot
parent 66f7bb0ffd
commit 4643425ad2
6 changed files with 17 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
src/sql/ob_sql_trans_control.cpp
View File

@ -656,7 +656,10 @@ int ObSqlTransControl::stmt_setup_snapshot_(ObSQLSessionInfo *session,
auto &snapshot = das_ctx.get_snapshot();
if (cl == ObConsistencyLevel::WEAK || cl == ObConsistencyLevel::FROZEN) {
SCN snapshot_version = SCN::min_scn();
const bool local_single_ls = plan->is_local_plan() &&
OB_PHY_PLAN_LOCAL == plan->get_location_type();
if (OB_FAIL(txs->get_weak_read_snapshot_version(session->get_ob_max_read_stale_time(),
local_single_ls,
snapshot_version))) {
TRANS_LOG(WARN, "get weak read snapshot fail", KPC(txs));
int64_t stale_time = session->get_ob_max_read_stale_time();