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
:
> When I configure Tomcat to pool connections (let's
> say to start up with an initial 50), what should I see
> when I run netstat directly after starting Tomcat and
> before I make any calls to the web app? Should I see
> 50 connections (I don't)?
>
&g
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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
hould I see
when I run netstat directly after starting Tomcat and
before I make any calls to the web app? Should I see
50 connections (I don't)?
-marc
--- "Caldarale, Charles R"
<[EMAIL PROTECTED]> wrote:
> > From: "Marc Richards" <[EMAIL PROTECTED]>
>
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
several thousand
> > DB connections. that seems a bit odd to me.
> >
> > peter lin
> >
> >
> > On 12/15/05, Martin Gainty <[EMAIL PROTECTED]>
> wrote:
> >>
> >> Marc-
> >> what types of Coyote Point Equalizers are you
> using?
>
> 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
t; <[EMAIL PROTECTED]>
>> To: "Tomcat Users List"
>> Sent: Thursday, December 15, 2005 7:57 PM
>> Subject: Performance degradation under load
>>
>>
>>> I have a performance issue that I'm having trouble
>>> with - perhaps somebody has se
nfiguring the CPE
> for 30-40 consecutive
> > users?
> > Martin-
> > - Original Message -----
> > From: "Marc Richards" <[EMAIL PROTECTED]>
> > To: "Tomcat Users List"
> > Sent: Thursday, December 15, 2005 7:57 PM
> > Subject: Pe
y about configuring the CPE for 30-40 consecutive
> users?
> Martin-
> - Original Message -
> From: "Marc Richards" <[EMAIL PROTECTED]>
> To: "Tomcat Users List"
> Sent: Thursday, December 15, 2005 7:57 PM
> Subject: Performance degradatio
r 15, 2005 7:57 PM
Subject: Performance degradation under load
I have a performance issue that I'm having trouble
with - perhaps somebody has seen this sort of thing
before and can help me out.
Problem:
Under no load my page responses average about 1.2
seconds (according to jmeter tests), which
I have a performance issue that I'm having trouble
with - perhaps somebody has seen this sort of thing
before and can help me out.
Problem:
Under no load my page responses average about 1.2
seconds (according to jmeter tests), which is pretty
good considering the heavy jdbc useage of my
applicatio
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