25 Feb
2010
25 Feb
'10
11:51 a.m.
Ok, thanks for your answer.
In fact i had also change the other parameter (I haven't found any
information about this parameter on your website, maybe it will be good to
add something on it ?) :
xwiki.store.cache.pageexistcapacity (Which is in fact the maxNode for cache
xwiki.store.pageexistcache)
in xwiki.cfg.
I'm agree, maybe it will be easier to understanding if you remove
default-local.xml in fact.
Julien
Thomas Mortagne
<thomas.mortagne@
xwiki.com> A
Envoyé par : XWiki Developers <devs(a)xwiki.org>
devs-bounces@xwik cc
i.org
Objet
Re: [xwiki-devs] Question on
24/02/2010 14:28 JBossCache configuration and
EvictionPolicyConfig...
Veuillez répondre
à
XWiki Developers
<devs(a)xwiki.org>
On Wed, Feb 24, 2010 at 11:38, Julien Revert <jurevert(a)airfrance.fr> wrote:
Hi everyone,
Could you tell me if it's normal or if it's a bug; in fact i'm not sure.
I'm using jbosscache in local mode but attributes "timeToLiveSeconds" and
"maxNodes" in default-local.xml are not taken into account. It's
default.xml which is use.
It depends of the cache actually. Some caches are using "default" and
some others are using "default-local". Most of the caches are using
default.xml as default configuration. See
http://code.xwiki.org/xwiki/bin/view/Modules/CacheModule for more.
This goal was to separate caches we could want to synchronize between
several XWiki instances (default) and caches for which it's not useful
(default-local). But this distinction is not useful anymore since
clustering is not done using cache configuration anymore (as you
already know it ;)). We should probably remove the default-local
things and make all caches use default.xml as default configuration
file.
Now about maxNodes, if you are trying to set the document cache size
specifically, the best is probably to set the
xwiki.store.cache.capacity property in xwiki.cfg file.
Here are my configurations files :
xwiki.properties :
[...]
cache.cacheHint=jbosscache
cache.localCacheHint=jbosscache/local
[...]
default-local.xml :
<?xml version="1.0" encoding="UTF-8"?>
<server>
<mbean code="org.jboss.cache.jmx.CacheJmxWrapper"
name="jboss.cache:service=Cache">
<!-- Specific eviction policy configurations. This is LRU -->
<attribute name="EvictionPolicyConfig">
<config>
<attribute
name="wakeUpIntervalSeconds">5</attribute>
<attribute
name="policyClass">org.jboss.cache.eviction.LRUPolicy</attribute>
<!-- Cache wide default -->
<region name="/xwiki">
<!-- NOT TAKEN INTO ACCOUNT, BUG ? -->
<attribute name="maxNodes">5002</attribute>
<attribute
name="timeToLiveSeconds">21602</attribute>
</region>
</config>
</attribute>
</mbean>
</server>
default.xml :
<?xml version="1.0" encoding="UTF-8"?>
<server>
<!--
>
==================================================================== -->
<!-- Defines JBoss Cache configuration
> -->
<!--
>
==================================================================== -->
<!-- Note the value of the 'code'
attribute has changed since JBC
1.x
> -->
<mbean
code="org.jboss.cache.jmx.CacheJmxWrapper"
name="jboss.cache:service=Cache">
<!-- Specific eviction policy configurations. This is LRU -->
<attribute name="EvictionPolicyConfig">
<config>
<attribute
name="wakeUpIntervalSeconds">5</attribute>
<attribute
name="policyClass">org.jboss.cache.eviction.LRUPolicy</attribute>
<!-- Cache wide default -->
<region name="/xwiki">
<attribute name="maxNodes">5001</attribute>
<attribute
name="timeToLiveSeconds">21601</attribute>
</region>
</config>
</attribute>
</mbean>
</server>
In fact, the 'maxNodes' and 'timeToLiveSeconds' which are used are 5001
and
21601.
Is it normal ?
I would like adding that I'm trying to optimise my cache configuration
because we have error "java.lang.OutOfMemoryError: Java heap space" one
or
twice a week and we are suspecting a cache problem.
( Tomcat parameters used are : -Xms1024m -Xmx1048m -XX:MaxPermSize=128m
[...] )
We have many errors look like arround the OutofMemory :
08:47:45,880
[http://wiki-soa.airfrance.fr/xwiki/bin/view/XWiki/MyTestClass] ERROR
aseEvictionAlgorithm Eviction
of /xwiki/wikidict:BlogToolbar.WebPreferences failed
java.lang.NullPointerException
at org.apache.log4j.Category.log(Category.java:849)
at org.apache.commons.logging.impl.Log4JLogger.trace
(Log4JLogger.java:152)
at
org.jboss.cache.factories.ComponentRegistry.invocationsAllowed
(ComponentRegistry.java:816)
at
org.jboss.cache.invocation.CacheInvocationDelegate.cacheStatusCheck
(CacheInvocationDelegate.java:582)
at org.jboss.cache.invocation.CacheInvocationDelegate.evict
(CacheInvocationDelegate.java:355)
at org.jboss.cache.eviction.BaseEvictionPolicy.evict
(BaseEvictionPolicy.java:27)
at
org.jboss.cache.eviction.BaseEvictionAlgorithm.evictCacheNode
(BaseEvictionAlgorithm.java:231)
at org.jboss.cache.eviction.LRUAlgorithm.evict
(LRUAlgorithm.java:92)
at org.jboss.cache.eviction.LRUAlgorithm.prune
(LRUAlgorithm.java:172)
at org.jboss.cache.eviction.BaseEvictionAlgorithm.process
(BaseEvictionAlgorithm.java:116)
at org.jboss.cache.eviction.EvictionTimerTask.handleRegion
(EvictionTimerTask.java:133)
at org.jboss.cache.eviction.EvictionTimerTask.processRegions
(EvictionTimerTask.java:118)
at org.jboss.cache.eviction.EvictionTimerTask.access$000
(EvictionTimerTask.java:28)
at org.jboss.cache.eviction.EvictionTimerTask$1.run
(EvictionTimerTask.java:106)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
But in fact I don't know if this error is a cause or a consequence of
this
OutOfMemoryError.
Thanks,
Julien
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