[
https://issues.apache.org/jira/browse/CASSANDRA-8615?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14276069#comment-14276069
]
Aleksey Yeschenko commented on CASSANDRA-8615:
----------------------------------------------
Speculative retry is supposed to help with latency, not affect it negatively.
Is something wrong with our sampling, or has something broken recently in the
implementation?
Maybe the default (99p) was a poorly chosen one, and should be changed?
Providing another -D feels like a very poor band aid to me. Should investigate
and fix the cause instead.
> Create -D flag to disable speculative retry by default
> ------------------------------------------------------
>
> Key: CASSANDRA-8615
> URL: https://issues.apache.org/jira/browse/CASSANDRA-8615
> Project: Cassandra
> Issue Type: Improvement
> Reporter: J.B. Langston
>
> Some clusters have shown increased latency with speculative retry enabled.
> Speculative retry is enabled by default when upgrading from 1.2 to 2.0, and
> for large clusters it can take a long time to complete a rolling upgrade,
> during which time speculative retry will be enabled. Therefore it would be
> helpful to have a -D flag that will disable it by default during an upgrade.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
