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Posted to users@tomcat.apache.org by James Diggans <jd...@excelsiortech.com> on 2001/02/01 07:57:33 UTC
46 java threads???
I have tomcat running through mod_jk along with Apache. When tomcat is
launched it does so flawlessly but launches FORTY SIX 'java' threads,
each taking ~10MB of what gtop declares 'resident' memory (yes, 460MB
total). Now I realize these are probably sharing a memory space (since
I dont HAVE 460MB of RAM or swap) but is there a reason it's starting
46 threads? And can anyone tell me where I can configure this? It
seems ...... high.
Regards,
- j
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James C. Diggans
Excelsior Technologies, Inc. At what point did we stop
jdiggans@excelsior-web.com being citizens and start
http://www.excelsior-web.com being mere 'consumers'?
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Re: 46 java threads???
Posted by Alex Fernández <af...@tid.es>.
Aren't they part of a thread pool?
You don't want to initialize a thread every time a request comes; instead,
you better have them ready and waiting to serve incoming petitions. They
won't eat into your memory until they're used, and they share the same
memory.
Actually, for a production server I think 46 is not too much; just compute
your peak traffic and the time it takes to serve them. E.g., if you expect
40 requests/sec and each one takes 2 secs to fulfill, 80 threads in the
pool would be a good bet.
To find out how long it takes to serve a request, do a load test on your
pages. Take into account that it takes longer when the traffic is high.
Cheers,
Alex.
James Diggans wrote:
> I have tomcat running through mod_jk along with Apache. When tomcat is
> launched it does so flawlessly but launches FORTY SIX 'java' threads,
> each taking ~10MB of what gtop declares 'resident' memory (yes, 460MB
> total). Now I realize these are probably sharing a memory space (since
> I dont HAVE 460MB of RAM or swap) but is there a reason it's starting
> 46 threads? And can anyone tell me where I can configure this? It
> seems ...... high.
>
> Regards,
> - j
>
> ----------------------------------------------------------------------
> --------------
> James C. Diggans
> Excelsior Technologies, Inc. At what point did we stop
> jdiggans@excelsior-web.com being citizens and start
> http://www.excelsior-web.com being mere 'consumers'?
> ----------------------------------------------------------------------
> --------------
>
> ---------------------------------------------------------------------
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