[
https://issues.apache.org/jira/browse/HIVE-23052?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Marton Bod updated HIVE-23052:
------------------------------
Attachment: HIVE-23052.8.patch
> Optimize lock enqueueing in TxnHandler
> --------------------------------------
>
> Key: HIVE-23052
> URL: https://issues.apache.org/jira/browse/HIVE-23052
> Project: Hive
> Issue Type: Improvement
> Reporter: Marton Bod
> Assignee: Marton Bod
> Priority: Major
> Attachments: HIVE-23052.1.patch, HIVE-23052.2.patch,
> HIVE-23052.3.patch, HIVE-23052.4.patch, HIVE-23052.5.patch,
> HIVE-23052.6.patch, HIVE-23052.7.patch, HIVE-23052.8.patch
>
>
> * Reduce scope of next_lock_id select-for-update by moving the txn_component
> inserts before the S4U + inserting the hive_locks entries before the S4U
> (first with a temp ID, which will be replaced later in a single update). This
> helps decrease the overall time that the next_lock_id table is locked,
> thereby increasing concurrency
> * Insert txn_components in a batch instead of one-by-one (also in
> TxnHandler::addDynamicPartition)
> * Increment next_lock_id and update hive_locks table in a single batch
> statement
>
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
