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Posted to commits@cassandra.apache.org by "Yifan Cai (Jira)" <ji...@apache.org> on 2020/04/28 21:58:00 UTC
[jira] [Comment Edited] (CASSANDRA-15763) Tunable
RangeTombstoneList initial size and resize factor
[ https://issues.apache.org/jira/browse/CASSANDRA-15763?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17094881#comment-17094881 ]
Yifan Cai edited comment on CASSANDRA-15763 at 4/28/20, 9:57 PM:
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PR: [https://github.com/apache/cassandra/pull/573]
Code: [https://github.com/yifan-c/cassandra/tree/CASSANDRA-15763-tunable-rtl-init-size-n-factor]
Test: [https://app.circleci.com/pipelines/github/yifan-c/cassandra/60/workflows/3de6fbe8-81e8-4f33-abdd-da72adf4893b]
_Edit: test passed_
The PR added {{initial_range_tombstone_list_allocation_size}} and {{range_tombstone_list_growth_factor}} into config. They are configurable via JMX.
The default values of the 2 new properties are kept the same with the existing hard-coded ones.
- {{initial_range_tombstone_list_allocation_size}} : 1
- {{range_tombstone_list_growth_factor}}: 1.5
was (Author: yifanc):
PR: [https://github.com/apache/cassandra/pull/573]
Code: [https://github.com/yifan-c/cassandra/tree/CASSANDRA-15763-tunable-rtl-init-size-n-factor]
Test: [https://app.circleci.com/pipelines/github/yifan-c/cassandra/60/workflows/3de6fbe8-81e8-4f33-abdd-da72adf4893b]
The PR added {{initial_range_tombstone_list_allocation_size}} and {{range_tombstone_list_growth_factor}} into config. They are configurable via JMX.
The default values of the 2 new properties are kept the same with the existing hard-coded ones.
- {{initial_range_tombstone_list_allocation_size}} : 1
- {{range_tombstone_list_growth_factor}}: 1.5
> Tunable RangeTombstoneList initial size and resize factor
> ---------------------------------------------------------
>
> Key: CASSANDRA-15763
> URL: https://issues.apache.org/jira/browse/CASSANDRA-15763
> Project: Cassandra
> Issue Type: Improvement
> Components: Local/Config
> Reporter: Yifan Cai
> Assignee: Yifan Cai
> Priority: Normal
>
> Cassandra allocates a backing array with a fixed size of one when creating a new RangeTombstoneList object. The resize factor is fixed to 1.5.
> The initial size and resize factor could be made tunable so it could reduce cost in some cases.
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