> Can you quickly explain what you did to disable INFO-Level?
>
> I am from a PHP background and am not so well versed in Tomcat or
> Java. Is this a section in solrconfig.xml or did you have to edit
> Solr Java source and recompile?
1. Create a file called logging.properties with following content (I created it
in /home/tomcat/solr folder):
.level=INFO
handlers= java.util.logging.ConsoleHandler, java.util.logging.FileHandler
java.util.logging.FileHandler.formatter = java.util.logging.SimpleFormatter
java.util.logging.FileHandler.level = INFO
java.util.logging.ConsoleHandler.formatter = java.util.logging.SimpleFormatter
java.util.logging.ConsoleHandler.level = ALL
org.apache.solr.level=SEVERE
2. Modify file tomcat_installation/bin/catalina.sh to include following (as a
first line in script):
JAVA_OPTS="... ... ...
-Djava.util.logging.config.file=/home/tomcat/solr/logging.properties"
(this line may include more parameters such as -Xmx8196m for memory,
-Dfile.encoding=UTF8 -Dsolr.solr.home=/home/tomcat/solr
-Dsolr.data.dir=/home/tomcat/solr for SOLR, etc.)
With these settings, SOLR (and Tomcat) will use standard Java 5/6 logging
capabilities. Log output will default to standard /logs folder of Tomcat.
You may find additional logging configuration settings by google for "Java 5
Logging" etc.
>
>
> 2009/12/20 Fuad Efendi <f...@efendi.ca>:
> > After researching how to configure default SOLR & Tomcat logging, I
> finally
> > disabled INFO-level for SOLR.
> >
> > And performance improved at least 7 times!!! ('at least 7' because I
> > restarted server 5 minutes ago; caches are not prepopulated yet)
> >
> > Before that, I had 300-600 ms in HTTPD log files in average, and 4%-8%
> I/O
> > wait whenever "top" commands shows SOLR on top.
> >
> > Now, I have 50ms-100ms in average (total response time logged by HTTPD).
> >
> >
> > P.S.
> > Of course, I am limited in RAM, and I use slow SATA... server is
> moderately
> > loaded, 5-10 requests per second.
> >
> >
> > P.P.S.
> > And suddenly synchronous I/O by Java/Tomcat Logger slows down
> performance
> > much higher than read-only I/O of Lucene.
> >
> >
> >
> > Fuad Efendi
> > +1 416-993-2060
> > http://www.linkedin.com/in/liferay
> >
> > Tokenizer Inc.
> > http://www.tokenizer.ca/
> > Data Mining, Vertical Search
> >
> >
> >
> >
> >
Fuad Efendi
+1 416-993-2060
http://www.linkedin.com/in/liferay
Tokenizer Inc.
http://www.tokenizer.ca/
Data Mining, Vertical Search
