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Single round trip commit on BatchExecute #4739

Merged
merged 1 commit into from
Mar 22, 2019
Merged

Single round trip commit on BatchExecute #4739

merged 1 commit into from
Mar 22, 2019

Commits on Mar 21, 2019

  1. Single round trip commit on BatchExecute 

    * When auto-commit is on, passDML is on and ExecuteBatch is in a transaction,
there is no need to explicitly create a transaction. We can forward the DML
directly to the database.
* This optimization yielded significant more throughput in vttablets. We got
around 25-30% improvement. Most of our queries are single point
inserts/updates that already use auto commit  when coming from vtgates, so this
improvement is something that we've been wanting to do for a long time.

Signed-off-by: Rafael Chacon <rafael@slack-corp.com>
    @rafael
    rafael committed Mar 21, 2019
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