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From sur_1805 <sur_1...@yahoo.co.in>
Subject RE: Installing tomcat on multiple cpu X_86 64 bit machine
Date Wed, 07 May 2008 05:02:34 GMT

thanks peter for your information, i m very new to this situation.

now. can i install the tomcat5.5 and jdk1.5 on machine(4 processor with 64
bit on RHEL 5) without need to worry about load balancing and tuning at the
time of installation?






Peter Crowther wrote:
> 
>> From: sur_1805 [mailto:sur_1805@yahoo.co.in]
>> i m using linux(RHEL 5) with 16 GB RAM.
> 
> OK.
> 
>> Is
>> it possible to split the JVM off into multiple processes for
>> the hundreds of threads we end up running?
> 
> Sort-of, but think: why would you want to?  Modern Linuxes can handle
> hundreds of threads per process without worrying.
> 
> If you want to do this, you could run multiple JVMs with some kind of
> load-balancer in front of them.  Some sites do this for reliability -
> losing one JVM doesn't kill the site.  There's another thread on the list
> at the moment that shows that some people find it slower, others find it
> faster.  It seems to depend on the application.
> 
> There is no way of splitting a *single* JVM into multiple processes.
> 
>> How much memory i have to allocate to heap memory that is
>> sufficient and do
>> not become the major performance bottleneck.?
> 
> As much as your application needs - and that depends almost entirely on
> your app, as I suspect under 1% of the load will be Tomcat's overhead! 
> Your only way to find that out is to profile your application, on your
> hardware, with your database, under your realistic load.  Nobody on this
> list will be able to offer further advice except on profiling tools (we
> all have our favourites) and monitoring applications.
> 
>                 - Peter
> 
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> 

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