On 5 Sep 2012, at 20:51, llow...@oreillyauto.com
llow...@oreillyauto.com wrote:
I have a small cluster of 3 nodes running tomcat 6.0.24 with openJDK
1.6.0_20 on Ubuntu 10.04 LTS.
You should really consider upgrading Java.
While you're at it, try Tomcat 7.0.30 in your lab and have a look at
Hi Kyle,
Great testing, btw.
So when you say x5, did you change the settings as follows:
rxBufAize=125940 (= 25188 x 5)
By any chance, have you analyzed a heapdump of Tomcat at periodic intervals
to see which class is hogging heap during the session replication?
Thanks.
Shanti:
So when you say x5, did you change the settings as follows:
rxBufAize=125940 (= 25188 x 5)
Yes, x5 means default values (25188 and 43800) times 5. Each value was
extrapolated in the spreadsheet so you can see them there too.
By any chance, have you analyzed a heapdump of Tomcat at
Shanti Suresh sha...@umich.edu wrote on 09/07/2012 12:37:34 PM:
From: Shanti Suresh sha...@umich.edu
To: Tomcat Users List users@tomcat.apache.org
Date: 09/07/2012 12:44 PM
Subject: Re: Tuning session replication on clusters
Hi Kyle,
Great testing, btw.
So when you say x5, did you
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Kyle,
On 9/7/12 12:19 PM, kharp...@oreillyauto.com wrote:
Chris:
Assembling the sessions into a Collection is likely to be very
fast, since it's just copying references around: the size of the
individual sessions should not matter. Of course,
developers...
Kyle Harper
From:kharp...@oreillyauto.com
To:Tomcat Users List users@tomcat.apache.org
Date:09/05/2012 07:55 PM
Subject:Re: Tuning session replication on clusters
I'm working with Lee on this as well, so I can help answer most of that.
In short: Yes
be greatly appreciated. I have a full test environment to
simulate anything you might recommend.
Sincerely,
Kyle Harper
From: Igor Cicimov icici...@gmail.com
To: Tomcat Users List users@tomcat.apache.org
Date: 09/05/2012 07:12 PM
Subject: Re: Tuning session replication
Thanks all for replies (and for the jmap/jps idea, hadn't thought of that
for some reason).
I tried increasing the maxThreads on the NioReceviever and noticed no
performance gain. I then modified the poolSize on the Transport element to
100 and saw no performance gain. This actually didn't
On 06.09.2012 15:10, kharp...@oreillyauto.com wrote:
... This actually didn't surprise me after I
discovered how large the sessions were. Using JMX (VisualVM) I watched the
Heap size on my two servers as I tested 7000 sessions. Heap climbed
approximately 1GB. When I restarted node2, I
On 06.09.2012 16:57, Rainer Jung wrote:
On 06.09.2012 15:10, kharp...@oreillyauto.com wrote:
... This actually didn't surprise me after I
discovered how large the sessions were. Using JMX (VisualVM) I
watched the
Heap size on my two servers as I tested 7000 sessions. Heap climbed
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Kyle,
On 9/5/12 9:59 PM, kharp...@oreillyauto.com wrote:
Alright, I did some more testing with another application and found
the following:
SessTime (sec 10 0.101 125 0.101 500 0.201 1500 0.201
1800
0.101 24000.101
Rainer: Thanks for the input. I'll do some additional testing with the
sendAllSessions attributes, but my initial testing didn't show much gain.
If the rx/tx settings are already chunking up the session bytes into
smallish payloads then nothing I change with the sendAllSessions will
improve
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Kyle,
On 9/6/12 2:45 PM, kharp...@oreillyauto.com wrote:
Chris:
One question: Plot those as X-Y in a spreadsheet and you'll see
that it's only a bit worse than linear, especially after 1500.
There's no enough data presented to draw an exponential
I have a small cluster of 3 nodes running tomcat 6.0.24 with openJDK
1.6.0_20 on Ubuntu 10.04 LTS.
I have roughly 5,000-6,000 sessions at any given time, and when I restart
one of the nodes I am finding that not all sessions are getting
replicated , even when I have the state transfer timeout
On Thu, Sep 6, 2012 at 5:51 AM, llow...@oreillyauto.com wrote:
I have a small cluster of 3 nodes running tomcat 6.0.24 with openJDK
1.6.0_20 on Ubuntu 10.04 LTS.
I have roughly 5,000-6,000 sessions at any given time, and when I restart
one of the nodes I am finding that not all sessions are
Subject:Re: Tuning session replication on clusters
On Thu, Sep 6, 2012 at 5:51 AM, llow...@oreillyauto.com wrote:
I have a small cluster of 3 nodes running tomcat 6.0.24 with openJDK
1.6.0_20 on Ubuntu 10.04 LTS.
I have roughly 5,000-6,000 sessions at any given time, and when I restart
Cicimov icici...@gmail.com
To: Tomcat Users List users@tomcat.apache.org
Date:09/05/2012 07:12 PM
Subject: Re: Tuning session replication on clusters
On Thu, Sep 6, 2012 at 5:51 AM, llow...@oreillyauto.com wrote:
I have a small cluster of 3 nodes running
@tomcat.apache.org
Date: 09/05/2012 07:55 PM
Subject:Re: Tuning session replication on clusters
I'm working with Lee on this as well, so I can help answer most of that.
In short: Yes, all our replication is working well. We have keepalived
acting as a vrrp device (no round-robin dns
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