You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@jackrabbit.apache.org by "Jukka Zitting (JIRA)" <ji...@apache.org> on 2009/04/22 15:27:47 UTC
[jira] Updated: (JCR-1997) Performance fix, when deserializing
large jcr:binary in ValueHelper.deserialize()
[ https://issues.apache.org/jira/browse/JCR-1997?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Jukka Zitting updated JCR-1997:
-------------------------------
Fix Version/s: (was: 1.6.0)
1.5.5
Merged to the 1.5 branch in revision 767511.
> Performance fix, when deserializing large jcr:binary in ValueHelper.deserialize()
> ---------------------------------------------------------------------------------
>
> Key: JCR-1997
> URL: https://issues.apache.org/jira/browse/JCR-1997
> Project: Jackrabbit Content Repository
> Issue Type: Bug
> Components: jackrabbit-jcr-commons
> Affects Versions: 1.4
> Environment: Win 2000
> Reporter: Henryk Paluch
> Priority: Trivial
> Fix For: 1.5.5
>
> Attachments: performance-fix-ValueHelper.java.difff
>
>
> While profiling import of large PDF files into Magnolia 3.6.3 (which uses Jackrabbit 1.4 as JCR repository) we had found that there is large CPU time spent on:
> "http-8080-4" daemon prio=6 tid=0x5569fc00 nid=0x6ec runnable [0x5712d000..0x5712fb14]
> java.lang.Thread.State: RUNNABLE
> at java.io.FileOutputStream.writeBytes(Native Method)
> at java.io.FileOutputStream.write(FileOutputStream.java:260)
> at org.apache.jackrabbit.util.Base64.decode(Base64.java:269)
> at org.apache.jackrabbit.util.Base64.decode(Base64.java:184)
> at org.apache.jackrabbit.value.ValueHelper.deserialize(ValueHelper.java:759)
> at org.apache.jackrabbit.core.xml.BufferedStringValue.getValue(BufferedStringValue.java:258)
> at org.apache.jackrabbit.core.xml.PropInfo.apply(PropInfo.java:132)
> Looking into source code of Base64.decode it became obvious, that it writes each 1to3byte chunk into unbuffered FileOutputStream (thus calling OS kernel many times to write just few bytes) which causes lot of CPU usage without disk usage.
> Provided fix is quite trivial - just wrap FileOutputStream into BufferedOutputStream.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.