We were talking about GC options a lot; don't forget to enclose following
into "if (log.isInfoEnabled())":
...
final NamedList<Object> responseHeader = new SimpleOrderedMap<Object>();
rsp.add("responseHeader", responseHeader);
NamedList toLog = rsp.getToLog();
//toLog.add("core", getName());
toLog.add("webapp", req.getContext().get("webapp"));
toLog.add("path", req.getContext().get("path"));
toLog.add("params", "{" + req.getParamString() + "}");
handler.handleRequest(req,rsp);
setResponseHeaderValues(handler,req,rsp);
StringBuilder sb = new StringBuilder();
for (int i=0; i<toLog.size(); i++) {
String name = toLog.getName(i);
Object val = toLog.getVal(i);
sb.append(name).append("=").append(val).append(" ");
}
log.info(logid + sb.toString());...
...
-Fuad
> -----Original Message-----
> From: Fuad Efendi [mailto:f...@efendi.ca]
> Sent: December-20-09 2:54 PM
> To: solr-user@lucene.apache.org
> Subject: SOLR Performance Tuning: Disable INFO Logging.
>
> 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
>
>
>
