Adam Allgaier wrote:
> I would plug jconsole into your resin instance and watch what's happening to 
> the JVM memory.  Could be loose open threads (and large thread size) that 
> grows over time and eats up free memory.  Restarting would kill all the 
> threads and free the memory.
>
> http://java.sun.com/j2se/1.5.0/docs/guide/management/jconsole.html
>
> Adam
>
>   
Thanks, but as I'd hoped I'd made clear Resin itself shows flat memory 
use, whether using jconsole, jprofiler, /resin-admin or any of the other 
jvmti tools I've used to try to fix this. The memory consumption occurs 
outside java.
>
> ----- Original Message ----
> From: Stargazer <starga...@blueyonder.co.uk>
> To: General Discussion for the Resin application server 
> <resin-interest@caucho.com>
> Sent: Saturday, March 21, 2009 4:39:56 AM
> Subject: Re: [Resin-interest] Perf Issues
>
> Ronan Lucio wrote:
>   
>> Hi,
>>
>> We have had a perf issue.
>>
>> Our servers have 4Gb RAM. It has just Resin and Apache installed.
>>
>> The problem is, when I start Resin, the whole server uses about 2.5 Gb RAM
>> After that memory usage keep growing til it reachs the 4Gb RAM, use swap
>> and so on.
>>
>> After few hours the application start getting slow.
>> Analyzing the server sources, it's using so low CPU, load about 1... I
>> see none overload evidence, except for RAM memory.
>>
>> So I just restart Resin and/or Apache and application gets fast again,
>> but few ours later it will raise the same issue.
>>
>>  
>>     
> I have been suffering from exactly those symptoms for years.
> Do your httpd processes consume all the swap, with top showing some at 
> 450Mb? (default httpd.conf values)  I.e does restarting apache alone, 
> and not resin, cause the swap to drop back down to normal until the next 
> slow growth starts it all again?
>
> That is my pattern. So when I profile resin theres no unusual growth 
> even through the whole server is effectiviley dead until restart. Given 
> that, whos to blame? Could mod_caucho somehow be at fault even though 
> resin itself is ok?
>
> I have another identical server running a couple of PHP CMS apps, no 
> resin or java in sight - because of this problem actually. The plan is 
> to move everything over when stable but these have become too critical 
> to play with. Their typical httpd swap use is 25Mb, and its the default 
> httpd.conf. I would dearly love to know what the httpd on the failing 
> server thinks it needs to hold onto 450Mb for, without tweaking there 
> could be 20 of these. There are other non-quercus PHP apps running on 
> that server btw.
>
> My "solution" is to kill child httpd processes at a far quicker rate 
> than you'd normally want, and it works of sorts:
>
> <IfModule prefork.c>
> StartServers       8
> MinSpareServers    5
> MaxSpareServers   20
> ServerLimit      256
> MaxClients       256
> MaxRequestsPerChild  96
> </IfModule>
>
> <IfModule worker.c>
> StartServers         2
> MaxClients         150
> MinSpareThreads     25
> MaxSpareThreads     75
> ThreadsPerChild     25
> MaxRequestsPerChild  96
> </IfModule>
>   
>> This problem usually happens on peaks hours.
>>
>> So we upgraded RAM memory to 8Gb with a PAE kernel.
>> Although it doesn't reach the 8G RAM, slow moments gots for frequent. It
>> seems to work worse that way (8Gb + PAE kernel).
>>
>> The question is:
>> Is there everyone having the same issue with Resin (3.1.6)?
>> My doubt if such problem resides either on Resin or on my application.
>>
>>  
>>     
> All versions prior to 3.1.6, and currently with 3.2.1 Pro
>   
>> Thanks,
>> Ronan
>>
>>
>>
>> _______________________________________________
>> resin-interest mailing list
>> resin-interest@caucho.com
>> http://maillist.caucho.com/mailman/listinfo/resin-interest
>>  
>> ------------------------------------------------------------------------
>>
>>
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com 
>> Version: 8.0.238 / Virus Database: 270.11.21/2014 - Release Date: 03/20/09 
>> 06:59:00
>>
>>  
>>     
>
>
>
>
> _______________________________________________
> resin-interest mailing list
> resin-interest@caucho.com
> http://maillist.caucho.com/mailman/listinfo/resin-interest
>
>
>
>       
>
>
> _______________________________________________
> resin-interest mailing list
> resin-interest@caucho.com
> http://maillist.caucho.com/mailman/listinfo/resin-interest
>   
> ------------------------------------------------------------------------
>
>
> No virus found in this incoming message.
> Checked by AVG - www.avg.com 
> Version: 8.0.238 / Virus Database: 270.11.22/2015 - Release Date: 03/20/09 
> 19:01:00
>
>   




_______________________________________________
resin-interest mailing list
resin-interest@caucho.com
http://maillist.caucho.com/mailman/listinfo/resin-interest

Reply via email to