Sent: Friday, December 16, 2005 8:36 AM
To: Tomcat Users List
Subject: Re: Performance degradation under load
Marc-
What version of JVM?
what version tomcat?
Martin-
- Original Message -
From: "Marc Richards" <[EMAIL PROTECTED]>
To: "Tomcat Users List" ; "Mart
Marc-
What version of JVM?
what version tomcat?
Martin-
- Original Message -
From: "Marc Richards" <[EMAIL PROTECTED]>
To: "Tomcat Users List" ; "Martin Gainty"
<[EMAIL PROTECTED]>
Sent: Friday, December 16, 2005 11:02 AM
Subject: Re: Performa
?
> > Viel Gluck!
> > Martin-
> >
> > - Original Message -
> > From: "Jess Holle" <[EMAIL PROTECTED]>
> > To: "Tomcat Users List"
> > Sent: Friday, December 16, 2005 10:29 AM
> > Subject: Re: Performance degradation u
racle..but am
> hard pressed for
> specific details on implementing performance tuning
> with DB2
>
> Anyone else?
> Viel Gluck!
> Martin-
>
> - Original Message -
> From: "Jess Holle" <[EMAIL PROTECTED]>
> To: "Tomcat Users Li
Yes, we do joins where appropriate and I guess I
should clarify the inaccuracy of my initial statement
- there is one connection per request (for each
individual sql), rather then for each unique table.
-marc
--- Jess Holle <[EMAIL PROTECTED]> wrote:
> Caldarale, Charles R wrote:
>
> >This real
- Original Message -
From: "Jess Holle" <[EMAIL PROTECTED]>
To: "Tomcat Users List"
Sent: Friday, December 16, 2005 10:29 AM
Subject: Re: Performance degradation under load
Caldarale, Charles R wrote:
This really sounds like you're not using connection poo
Caldarale, Charles R wrote:
This really sounds like you're not using connection pooling, but instead
are opening a new connection for each request. How many do you have
configured in the pool? If it's less than the number you see with
netstat, that would be another indication that your app is
ist" ; "Martin Gainty"
<[EMAIL PROTECTED]>
Sent: Thursday, December 15, 2005 11:29 PM
Subject: Re: Performance degradation under load
While you are running how many database connections does your database
report having open? You might want to use the tomcat manager status
Hi Marc,
it still sounds like it could be a connection pool issue to me. Which of
the available connection pools are you using and how exactly have you set
it up in your tomcat config? Maybe we can see something in there.
Cheers, Jan
Jan Behrens
OFFIS
FuE-Bereich Betriebliches Informationsman
When starting a new thread (ie sending a message to the list about a
new topic) please do not reply to an existing message and change the
subject line. To many of the list archiving services and mail clients
used by list subscribers this makes your new message appear as part
of the old thread. Thi
Subject: Re: Performance degradation under load
I hear YourKit is good. I've mainly used OptimizeIt the last 4 years and it
works well for me.
something odd is definitely happening. at this point, it sounds you've
exhausted all the obvious and not so obvious options, so it's probably m
Thanks, I'll check into that. Maybe I can get an eval
license right away and update if I find anything.
Thanks,
-marc
--- Peter Lin <[EMAIL PROTECTED]> wrote:
> I hear YourKit is good. I've mainly used OptimizeIt
> the last 4 years and it
> works well for me.
>
> something odd is definitely
I hear YourKit is good. I've mainly used OptimizeIt the last 4 years and it
works well for me.
something odd is definitely happening. at this point, it sounds you've
exhausted all the obvious and not so obvious options, so it's probably most
fruitful to profile it.
peter
On 12/16/05, Marc Ric
No, the firewall is in front of the load balancers and
the servers are separated from the network by the dmz.
At some point there will be a reverse proxy in there
somewhere (they tell me - I'm not a network engineer),
but at the moment it's not open to the internet so I
just have it directly opene
Yes, I agree - I thought that too, but didn't really
know what I was suppose to be seeing. I have Tomcat
configured to open 500 (because I was mucking around
trying to make it work, not because I think that's the
right setting) connections on startup and maintain a
minimum of 100 idle at any time.
sounds like you have a big big mainframe, so I also doubt the database
server is an issue. Is there any firewall between tomcat and the database
server? it could be the firewall is limiting the number of connections and
therefore forcing the db connection pool to wait longer than it should to
crea
No, the db is actually our world-wide enterprise
server. It's got plenty of capacity for handling many
hundreds of thousands of daily transactions. When I'm
pounding the web app I literally can not even see my
activity on the machine and the disk arms are all
calm. It's made for tougher stuff th
> From: "Marc Richards" <[EMAIL PROTECTED]>
> Subject: Performance degradation under load
>
> Tomcat is handling connection pooling to our iSeries
> database server (db2, jdbc), but I'm not sure it's
> working correctly because when I do netstat I see
> several thousand db connections sitting at TI
While you are running how many database connections does your database
report having open? You might want to use the tomcat manager status app to
see how many threads you are using, how many sessions are being created,
etc. Lots of sessions can eat up memory as well if they are not being killed
off
19 matches
Mail list logo
