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Posted to users@tomcat.apache.org by m zyzy <my...@gmail.com> on 2009/06/18 11:13:37 UTC
tomcat maximum thread settings
Whenever I see to the server status page in the manager webapp I
always see the maximum threads were set to 200 , can I increase the
thread quantity , as I noticed with 3 users sessions at once for one
webapp, the threads count usually between 2 or 3 . as I plan to have
more than 200 users by the time the webapp is fully implemented , I
thought the threads maximum might need some tweaking.
Thanks.
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RE: tomcat maximum thread settings
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: m zyzy [mailto:myzyzy@gmail.com]
> Subject: Re: tomcat maximum thread settings
>
> can I increase the maximum threads value from 200 to something
> larger like perhaps 400 or 500 for each webapp ?
The maxThreads value is for a <Connector> (or perhaps executor, if you're using that), not a webapp. How large you can make it depends on the platform and JVM you're running on. More threads require more Java heap and more process space; adding threads won't help if the requests bottleneck somewhere in your webapp, such as when making database requests.
You can't meaningfully tune something until you measure it under the expected load.
- Chuck
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Re: tomcat maximum thread settings
Posted by m zyzy <my...@gmail.com>.
can I increase the maximum threads value from 200 to something larger
like perhaps 400 or 500 for each webapp ?
Thanks.
On Thu, Jun 18, 2009 at 7:59 PM, Caldarale, Charles
R<Ch...@unisys.com> wrote:
>> From: m zyzy [mailto:myzyzy@gmail.com]
>> Subject: tomcat maximum thread settings
>>
>> Whenever I see to the server status page in the manager webapp I
>> always see the maximum threads were set to 200 , can I increase the
>> thread quantity , as I noticed with 3 users sessions at once for one
>> webapp, the threads count usually between 2 or 3 . as I plan to have
>> more than 200 users by the time the webapp is fully implemented , I
>> thought the threads maximum might need some tweaking.
>
> Is there a question here?
>
> Note that the maximum threads value limits the number of concurrent *requests*, not the number of users. If you are using the standard blocking connector and keep-alives, a thread will be dedicated to the client connection until the keep-alive period expires; the NIO and APR connectors avoid that issue.
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
>
>
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> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
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>
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RE: tomcat maximum thread settings
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: m zyzy [mailto:myzyzy@gmail.com]
> Subject: tomcat maximum thread settings
>
> Whenever I see to the server status page in the manager webapp I
> always see the maximum threads were set to 200 , can I increase the
> thread quantity , as I noticed with 3 users sessions at once for one
> webapp, the threads count usually between 2 or 3 . as I plan to have
> more than 200 users by the time the webapp is fully implemented , I
> thought the threads maximum might need some tweaking.
Is there a question here?
Note that the maximum threads value limits the number of concurrent *requests*, not the number of users. If you are using the standard blocking connector and keep-alives, a thread will be dedicated to the client connection until the keep-alive period expires; the NIO and APR connectors avoid that issue.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY MATERIAL and is thus for use only by the intended recipient. If you received this in error, please contact the sender and delete the e-mail and its attachments from all computers.
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