Re: [Archive-access-discuss] very slow Tomcat 7

[Erik H. <eri...@uc...>]

At Mon, 12 Dec 2011 12:36:18 +0000,
Matjaž Kragelj wrote:
> 
> Hi everyone,
> 
> 
> I'll go straight to the problem:
> 
> We have (on VMware) a server (Quad-core AMD Opteron, 2.4Ghz, (4 processors), 20GB RAM, Windows server 2008 R2, 64 bit)
> Apache Tomcat 7.0.23 and aplications Web Curator Tool and 2 instances of Wayback machine (version 1.6 and 1.6.1)
> Apache Tomcat 6 - for Solr Lucine - full text search
> 
> Tomcat 7 has 9GB Ram, Tomcat 6 has 5Gb.
> I tried with several initial and maximum memory pool in tomcat (from 6GB max to 13Gb max) but it is pretty much the same after an hour or so.
> Last few days Wayback reindexed data (89GB, 28.000 files in sub directories) and I had to stop all other applications for a few days, because the process (create index for 27.000 files took almost 3 days)
> 
> So, the problem we have is very, very slow Tomcat. We prectically get timeout every time using WCT. It takes a whole minute to get welcome screen.Wayback is also very very slow.  Now, wher Tomcat (7 and 6) got 13.5 gb together, windows consuption of RAM is approx 15GB.
> 
> Java opts is:
> -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9004 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Xms768m -Xmx13000m
> 
> JVM version is 1.6.0_21-b07
> I just tried with disabling Paging file, we'll see the difference..
> 
> I have a jsp script which shows the consumption of Java - here is a static html file: http://www.nuk.uni-lj.si/java.htm
> 
> My question is - is this normal? Am I doing something wrong or do I really need more than 20GB of RAM to run Wayback machine and WCT on the same machine.
> 
> If anyone has an idea - please share it with me.
> If anyone needs more data to understand the situation - here I am..

Hi Matjaž,

This might not help you much.

We use wayback with CDX files with far less memory usage and quick
response. I don’t know if this is possible with WCT, but you might
want to give it a look. It is trickier to set up, but it works well.

best, Erik