[
https://issues.apache.org/jira/browse/ZOOKEEPER-4701?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17727809#comment-17727809
]
Christopher Tubbs commented on ZOOKEEPER-4701:
----------------------------------------------
It seems to me that zkEnv.sh is a user editable configuration file. If you
don't like the default settings, why not just edit the file to meet your
requirements? Some defaults may be preferred by some users, and other defaults
work better for other users. I don't know that there's substantial value in
debating the best default settings or tweaking them to suit a specific user's
preferences. If the preferences aren't to a particular user's liking, they can
just change them for themselves.
> Unable to use other JVM memory options to control zookeeper memory usage.
> -------------------------------------------------------------------------
>
> Key: ZOOKEEPER-4701
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-4701
> Project: ZooKeeper
> Issue Type: Improvement
> Components: scripts
> Affects Versions: 3.5.9, 3.5.10, 3.5.0, 3.5.1, 3.5.2, 3.5.3, 3.5.4, 3.6.0,
> 3.6.3, 3.7.0, 3.5.5, 3.5.6, 3.5.7, 3.6.1, 3.5.8, 3.6.2, 3.8.0, 3.7.1, 3.6.4,
> 3.8.1
> Reporter: zhanglu153
> Priority: Minor
> Labels: Zookeeper
>
> After upgrading from version 3.4.14 to version 3.6.4, it was found that other
> JVM memory options such as - XX: MaxRAMPercentage cannot be used to control
> the memory usage of zookeeper. Upon investigation, it was found that the
> reason was due to the addition of a default setting for heap size in the
> zkEnv.sh script in version 3.5, with a default value of 1000M.
> {code:java}
> ZK_SERVER_HEAP="${ZK_SERVER_HEAP:-1000}"
> export SERVER_JVMFLAGS="-Xmx${ZK_SERVER_HEAP}m $SERVER_JVMFLAGS"{code}
> When the user uses - XX: MaxRAMPercentage to control the memory usage of
> zookeeper, it is found that the memory configuration will be overwritten by
> the default - Xmx configuration value. This does not meet the memory usage
> configuration required by the user.
> In ZOOKEEPER-4391, Unable to use newer JVM memory settings as Xmx overrides -
> ASF JIRA (apache.org)], it is also proposed to add a flag to disable the
> memory configuration behavior by default. This default value can only be
> optionally released when users need to use the default heap size
> configuration.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
