My netview machines run with 2 GB of memory (typically about 1 gb in use).
System Memory is NOT the bottleneck.
-----Original Message-----
From: Jane Curry [mailto:jane.curry AT skills-1st.co DOT uk]
Sent: Monday, May 12, 2003 1:25 PM
To: Barr, Scott; NetView mailing list
Subject: Re: [nv-l] java hogging CPU
Hi Scott,
Re memory - I can definitely confirm that java gives you horrible
thrashing if you don't have enough memory. I was running on a 256Mb
machine until lunchtime when the extra 256Mb arrived. This does make
some things a little faster (like it only takes half forever to, say,
bring up web console security); the bad news is that the extra memory
just seems to move the bottleneck to CPU. This system now has 512Mb
memory and runs NV7.1.3 and Switch Analyzer with a tiny database of 80
objects - nothing else other than AIX 5.1 ML03 at present.
For comparison, I was recently using OpenView NNM 6.4 on a 384Mb Solaris
2.8 system and it's Web Console I have to say was much faster compared
with my 512Mb RAM NV Web Console on AIX. Perhaps they know how to tune
java????
Cheers,
Jane
Barr, Scott wrote:
>I share your concerns 100%
>
>My hunch is that the machine (Solaris in my case) is getting hammered swapping
>because the basic memory allocation for a java environment is too small for
>the actual application. The web console wants about 71mb for instance, but the
>basic allocation is 64 mb and there fore, no matter what, you spend your time
>swapping java back in and out. Janes comment about it being pure CPU don't
>jive with that, so I could be wrong.
>
>If I had any number of web console users this would be a significant concern.
>But Jane's point is right on the money, it consumes entirely too much of the
>machine.
>
>I have heard that using an alternate java deployment (such as IBMs) can help,
>but I don't know whether AIX uses that nifty IBM java machine or whether it
>uses a stock one.
>
>-----Original Message-----
>From: Jane Curry [mailto:jane.curry AT skills-1st.co DOT uk]
>Sent: Monday, May 12, 2003 12:13 PM
>To: NetView mailing list
>Subject: [nv-l] java hogging CPU
>
>
>Is anyone else really bored by the way NetView's java processes (jetty
>and snmpserver in particular) just max out an AIX system on CPU? I've
>recently built a NV 7.1.3 on AIX 5.1 hoping for better things but java
>still hogs most of the resources - it's pure CPU, there's no thrashing
>going on. Add on a TEC java console or something like CiscoWorks and
>you can simply forget it.
>
>I tried Oliver's suggestion about looking at AIX manuals on Java tuning
>(with AIX 4.3.3) but this didn't really help.
>
>Does anyone have any good, specific recommendation for tuning java for
>NetView on AIX?
>
>Thanks,
>Jane
>
>
>
--
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Copyright (c) 2003 Jane Curry <jane.curry AT skills-1st.co DOT uk>. All rights
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