[omniORB] General Performance Strategy Questions...

[Sean Parker]

Thanks Richard for your reply. I was looking more for
OS-level (or changes I can make to omniORB and recompile)
that would allow more than the apparent 256 threads. Does
this limit sound familiar? I had been playing with various
permutations of thr/conn, thr policy, idle conn timeouts,
etc. and there seems to be a 256 thread ceiling.

  I had recently set the setrlimit() libc function, for
increasing the # open file handles, and that seemed to
help. Is that the only real thing I can aside from
redesigning my server?

  Thanks
    Sean


--- "Ridgway, Richard (London)" <Richard_Ridgway at ml.com>
wrote:

> I recommend jacorb rather than sun for the Java ORB.
> There's plenty of
> tuning available there. I've no personal experience with
> the Sun ORB,
> but I haven't heard anything good about it...
> 
> Quick browse of the omniorb manual indicates
> maxServerThreadPoolSize is
> probably what you need.
> 
> 
> -----Original Message-----
> From: omniorb-list-bounces at omniorb-support.com
> [mailto:omniorb-list-bounces at omniorb-support.com] On
> Behalf Of Sean
> Parker
> Sent: 10 August 2007 21:45
> To: omniorb-list at omniorb-support.com
> Subject: [omniORB] General Performance Strategy
> Questions...
> 
> 
> 
> Hello - 
> 
>   (Duncan - I haven't resolved the GIOP error issue yet -
> it doesn't seem to be IDL-mismatch, but I've got bigger
> fish to fry right now. "-ORBstrictIIOP 0" keeps us going
> for now... and I don't think it's related to the issue
> below, since I've had these performance problems way
> before
> the GIOP error came up)
> 
>   Thanks to OminORB for being as good as it is - we're
> pounding the hell out of it, and I think I need to start
> optimizing things in order for us to have a well-behaved
> system. Our system is basically 100+ servers (RH 9 and
> above) with ~200 CORBA servers (many identical.)
> 
>   We have a SystemMonitor that collects data from each
> server, and a DataRepository that most servers post data
> to. Needless to say the SystemMonitor and DataRepository
> are hurting unless I do something NOW to relieve the
> pressure :-)
> 
>   We have ~ 5 Java applications, using Sun's canned ORB
> to
> access the SystemMonitor for status also. One of them is
> a
> Servlet running in Tomcat. The problem seems to be that
> the
> SystemMonitor is so busy COLLECTING data, (and the rest
> of
> the system is verifying that the SystemMonitor is up, so
> they ping the SystemMonitor occasionally and pushing
> monitor data) that the Servlet accesses to get monitor
> data
> for display fail, even though the monitor seems to be up
> and running. (i.e. Transient exc, for example)
> 
>   I presume this is a timeout due to inability to obtain
> a
> connection on the SystemMonitor. Is this likely? I setup
> the SystemMonitor to free up connections as fast as
> possible: scanGranularity=1, inConScanPeriod=1,
> outConScanPeriod=1. (is this doing what I think it
> should?)
> Does anyone have experience with any issues between Sun's
> ORB and OmniORB that may raise it's ugly head on this
> issue? 
> 
> *****
> As a side question, I can't find any info on tuning Sun's
> ORB (Thanks Duncan for all of OmniORB's options), like
> timeouts, etc. Any info you know of?
> *****
> 
>   In general, what's the best way to ensure that a
> server,
> that will be pounded, will most-likely be able to service
> as many connections as possible, especially when each
> method call is quick to return? Also, how would I go
> about
> increasing the number of threads allowed, so I can
> increase
> the thread/connection combination above 256? (I'm
> allowing
> only 1 or 2 threads/connection, since it's likely that
> any
> client won't be pegging the SystemMonitor from more than
> one thread)
> 
>   I suppose you people are like "what the hell is he
> doing"? or "that's a silly design"? or "he should do
> this..." Any suggestions appreciated.
> 
> 
>   Thanks and God Bless
>     Sean
> 
> 
> 
> 
> 
> 
> God Bless 
>     Sean Parker 
> 
> 
> 
> 
> 
>  
>
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God Bless 
    Sean Parker 





       
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