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From Harry Metske <harry.met...@gmail.com>
Subject Re: Tomcat on AIX 5.3
Date Wed, 14 Apr 2010 19:30:30 GMT
Janos,

there are no clues that the delays are caused by tomcat, so maybe you should
look in general at other causes of delays.
There are a multiple components in the chain that can cause delays,
networking, IO, CPU.
You did not mention how much CPU you have at your disposal on your P6
machine, maybe you can have a look with IBM's nmon tool, contact your AIX
support colleagues.
And if your application has logging (maybe you can increase loglevels), that
is the first spot to look at, that should give you a clue where the delays
are.

regards,
Harry


2010/4/14 János Löbb <janos.lobb@yale.edu>

> Filip,
> ,
> What tool  - java based or aix based -, can I use to see where does the
> time go ?  /I am not a Java programmer/
> I do not think it is the webapp, or tomcat, because the same configuration
> is fast on OSX server.
> DNS is working fine.
>
> Thanks ahead,
>
> János
>
> On Apr 14, 2010, at 11:28 AM, Filip Hanik - Dev Lists wrote:
>
>  you'd have to figure out what takes the time. Could be anything, including
>> a DNS timeout
>>
>> Filip
>>
>> On 04/14/2010 08:34 AM, János Löbb wrote:
>>
>>> Hi,
>>>
>>> I installed Tomcat 6.0.26 in an IBM P6 LPAR .  The java version is
>>> "1.5.0" that is equivalent to Java 5.  The LPAR has 12G memory and there are
>>> two databases on it, a Sybase and a MySql.  Sybase takes 3 G and mysql takes
>>> 3 G, so there is still plenty for Tomcat.
>>>
>>> The idea to put Tomcat here, was, that the webapp is connecting to the
>>> Sybase database on this LPAR, so getting the data locally should be faster
>>> than getting it via the network from another machine running Tomcat.
>>>
>>> Interestingly it is not the case.  When the same webapp deployed on the
>>> LPAR and on the other machine - an OSX Server  10.5.8 -, the screens on a
>>> client machine are coming much faster from the OSX server compared to the
>>> AIX LPAR.
>>>
>>> Is there anything special configuring Tomcat on AIX than on OSX ?
>>>
>>> On both machines the memory settings are the same for tomcat :
>>> CATALINA_OPTS="-server -Xms512M -Xmx1024M"
>>>
>>> and on AIX the option to use the IPv4 Stack is set in JAVA_OPTS.
>>>
>>> None of the .xml files were modified in the conf directory.
>>>
>>> Thanks ahead,
>>>
>>> János
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>>
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