You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@hbase.apache.org by "Andrew Purtell (JIRA)" <ji...@apache.org> on 2009/07/12 11:25:14 UTC
[jira] Created: (HBASE-1648) heap usage and limit reporting doesn't
work as expected when using G1 GC
heap usage and limit reporting doesn't work as expected when using G1 GC
------------------------------------------------------------------------
Key: HBASE-1648
URL: https://issues.apache.org/jira/browse/HBASE-1648
Project: Hadoop HBase
Issue Type: Bug
Environment: Linux Centos x86_64 5.3, Sun JDK 1.6.0_14 (HotSpot 64-Bit Server VM build 14.0-b16)
Reporter: Andrew Purtell
Priority: Minor
Getting some early experience with the G1 GC.
Running with -Xmx1000m and HBASE_OPTS set to "-XX:+UnlockExperimentalVMOpts -XX:+UseG1GC". Regionserver heap use reports are not of much use:
{noformat}
hbase(main):001:0> status 'simple'
3 live servers
test3:60020 1247389283042
requests=0, regions=1, usedHeap=0, maxHeap=41
test2:60020 1247389219994
requests=0, regions=1, usedHeap=0, maxHeap=41
test4:60020 1247389324563
requests=0, regions=2, usedHeap=0, maxHeap=41
0 dead servers
{noformat}
top is about right:
{noformat}
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
23988 hadoop 24 0 1492m 98m 10m S 0.0 2.5 0:02.65 java
{noformat}
Incidentally, don't try -XX:+UseG1GC and -XX:+DoEscapeAnalysis together or the JVM will rapidly segfault.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (HBASE-1648) heap usage and limit reporting
doesn't work as expected when using G1 GC
Posted by "stack (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12730166#action_12730166 ]
stack commented on HBASE-1648:
------------------------------
If you set mx and ms (the minimum size on startup) == 1000m, does that help?
> heap usage and limit reporting doesn't work as expected when using G1 GC
> ------------------------------------------------------------------------
>
> Key: HBASE-1648
> URL: https://issues.apache.org/jira/browse/HBASE-1648
> Project: Hadoop HBase
> Issue Type: Bug
> Environment: Linux Centos x86_64 5.3, Sun JDK 1.6.0_14 (HotSpot 64-Bit Server VM build 14.0-b16)
> Reporter: Andrew Purtell
> Priority: Minor
>
> Getting some early experience with the G1 GC.
> Running with -Xmx1000m and HBASE_OPTS set to "-XX:+UnlockExperimentalVMOpts -XX:+UseG1GC". Regionserver heap use reports are not of much use:
> {noformat}
> hbase(main):001:0> status 'simple'
> 3 live servers
> test3:60020 1247389283042
> requests=0, regions=1, usedHeap=0, maxHeap=41
> test2:60020 1247389219994
> requests=0, regions=1, usedHeap=0, maxHeap=41
> test4:60020 1247389324563
> requests=0, regions=2, usedHeap=0, maxHeap=41
> 0 dead servers
> {noformat}
> top is about right:
> {noformat}
> PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> 23988 hadoop 24 0 1492m 98m 10m S 0.0 2.5 0:02.65 java
> {noformat}
> Incidentally, don't try -XX:+UseG1GC and -XX:+DoEscapeAnalysis together or the JVM will rapidly segfault.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.