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From java guru <javacoc...@yahoo.co.in>
Subject RE: performance tuning...
Date Thu, 23 Aug 2001 12:19:01 GMT
Hi.,
  I am not sure about everything else but the "first
hit stuff"..

  It is possible to greatly reduce the "first hit"
time by having the c2 pre-compiled...This reduced the
"first-hit" time greately for me...(specially i have
lots of xsps)..



 --- Karl_Øie <karl@gan.no> wrote: > I am sorry, I
really should have thought of that!,
> here we go:-)
> 
> my system is:
> -------------
> - dual Pentium 1ghz
> - 4 gb ram
> - 2 speedraided ldv 9gb scsi disks
> - linux slackware 8
> - sun sdk 1.3.1
> - tomcat 3.2.3
> - xalan 2.2.d9
> - xerces 1.4.3
> 
> 
> wget timing:
> ------------
> first run of "toc.html" -> 41.879s
> second run of "toc.html" -> 0.013s (!!!)
> 
> first run of "page.html?xpath=//*[@id='1222']" ->
> 58.031s
> second run of "page.html?xpath=//*[@id='1222']" ->
> 0.017s (!!!)
> 
> 
> questions:
> ----------
> as you can see the cache works great for a few
> pages, but the first hit
> takes a lot of time, so is it possible to hit every
> page at startup so the
> first visitors don't have to suffer?
> 
> how can I tune my cache settings? I have tried with
> this:
> 
>   <store
>
class="org.apache.cocoon.components.store.MRUMemoryStore">
>      <parameter name="freememory" value="1000000"/>
>      <parameter name="heapsize" value="600000000"/>
>      <parameter name="cleanupthreadinterval"
> value="10"/>
>      <parameter name="maxobjects" value="100"/>
>      <parameter name="usecleanupthread"
> value="true"/>
>      <parameter name="threadpriority" value="5"/>
>      <parameter name="filesystem" value="true"/>
>   </store>
> 
> but it doesn't really cut the cheese, after a some
> usage the site starts to
> regenerate the pages again, and the visitors will
> have to wait for nearly a
> minute for each call...
> 
> am I doing something wrong here?
> 
> 
> 
> mvh karl øie
> 
> 
> 
> 
> 
> -----Original Message-----
> From: Berin Loritsch [mailto:bloritsch@apache.org]
> Sent: 22. august 2001 21:53
> To: cocoon-users@xml.apache.org
> Subject: Re: performance tuning...
> 
> 
> Karl Øie wrote:
> >
> > Hi, I have a very standard pipeline for my
> project. The file
> > "oversikten.xml" is filtered through the
> stylesheet
> > "oversikten.xsl" which uses parameters sent to it
> to filter/rearrange the
> > output.
> >
> >         <map:match pattern="page.html">
> >                 <map:generate
> src="sources/oversikten.xml"/>
> >                 <map:transform
> src="oversikten.xsl">
> >                         <map:parameter
> name="use-request-parameters"
> value="true"/>
> >                 </map:transform>
> >                 <map:serialize type="html"/>
> >         </map:match>
> >
> > The file "oversikten.xml" is about 4mb large, and
> the site performs quite
> > badly. Is there any tips for improving the
> performance short of splitting
> > the file into smaller parts as this I am not
> allowed to do that.
> 
> 
> What are the numbers your are targeting?  (i.e. how
> fast do you need it?)
> What kind of hardware are you using?
> What are the current numbers you are getting? (i.e.
> how slow is it now?)
> 
> To really help you, we need these questions
> answered.
> 
> If you are using the Caching Pipeline, you should be
> able to experience
> better
> performance each time you request it.  However, if
> your cache is set too
> small
> to keep the entire XML in memory, the cache will be
> of no benefit.
> 
> How complicated are the XSLT stylesheets?  If you
> are not using global
> variables
> or parameters, that speeds things up.
> 
>
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=====
Thanks and have great day
srini

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