[
https://issues.apache.org/jira/browse/PHOENIX-6655?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17640901#comment-17640901
]
ASF GitHub Bot commented on PHOENIX-6655:
-----------------------------------------
virajjasani commented on PR #1534:
URL: https://github.com/apache/phoenix/pull/1534#issuecomment-1331162627
However, it would be good to assert on tests by using the
ColumnFamilyDescriptor APIs to validate that cacheOnWrite is set.
Moreover, I believe we should also set index and bloom blocks on write
together with data blocks (unless @apurtell has different opinion).
> SYSTEM.SEQUENCE should have CACHE_DATA_ON_WRITE set to true
> -----------------------------------------------------------
>
> Key: PHOENIX-6655
> URL: https://issues.apache.org/jira/browse/PHOENIX-6655
> Project: Phoenix
> Issue Type: Improvement
> Reporter: Geoffrey Jacoby
> Assignee: Gourab Taparia
> Priority: Major
> Attachments: Screenshot 2022-11-25 at 4.38.38 PM.png
>
>
> High volume use cases of Phoenix sequences need to write to the same row of
> SYSTEM.SEQUENCE very frequently, but each time we write, the block cache that
> row is in is invalidated and has to be loaded again.
> [~rushabh.shah] was looking at a case in our environment where a sequence was
> being used heavily and found lots of time spent reading the HFiles for the
> same Get of the sequence row within the SequenceRegionObserver increment
> coproc.
> [~apurtell] pointed out offline that HColumnDescriptor has a property,
> CACHE_DATA_ON_WRITE that keeps caches updated when a value is flushed. This
> should help improve contention on sequence increments.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
