hi all,
There is a performance issue in my service, It's a website, using HTML pages
serve static contents and jsp+struts+hibernate(proxool for DB connection pool)
for dynamic contents. If the connections are over 800, the service becomes
quite unstable, some requests get rapid response, but some NOT. I have been
tried Linux tools such as top/vmstat/free to analyze it, and I found that
CPU/memory/IO are NOT the bottle-neck. And the problem is none of business of
Oracle database, because that another application using this database works
fine.
-------------------------------
Key points:
1, The max connections that tomcat can handle? Your experiences are very
appreciated.
2, Any tools to analyze the performance bottle-neck?
3, Any other suggestion?
-------------------------------
Ok, this might be a complex problem to describe it clearly, the following
lines may be useful.
Hareware:
Two Dell 6850 server, 4*3.1Ghz CPU, 8G memory. One for application, and the
other for database(Oracle 10g)
-----------------------
Software:
OS: CentOS v4
apache-2.2.4+tomcat5.5.15
------------------------------
Application configuration parameters:
apache:
<IfModule prefork.c>
StartServers 100
MinSpareServers 100
MaxSpareServers 150
ServerLimit 10000
MaxClients 5000
MaxRequestsPerChild 0
</IfModule>
-----------------------------
#httpd -l
Compiled in modules:
core.c
mod_authn_file.c
mod_authn_default.c
mod_authz_host.c
mod_authz_groupfile.c
mod_authz_user.c
mod_authz_default.c
mod_auth_basic.c
mod_include.c
mod_filter.c
mod_log_config.c
mod_env.c
mod_setenvif.c
prefork.c
http_core.c
mod_mime.c
mod_status.c
mod_autoindex.c
mod_asis.c
mod_cgi.c
mod_negotiation.c
mod_dir.c
mod_actions.c
mod_userdir.c
mod_alias.c
mod_so.c
---------------------------
tomcat:
<Connector port="8083" maxHttpHeaderSize="8192"
maxThreads="2500" minSpareThreads="50" maxSpareThreads="100"
enableLookups="false" redirectPort="8443" acceptCount="300"
connectionTimeout="20000" disableUploadTimeout="true"/>
tomcat max-mem: 1.5G
------------------------------
proxool:
<house-keeping-sleep-time>90000</house-keeping-sleep-time>
<prototype-count>20</prototype-count>
<maximum-connection-count>450</maximum-connection-count>
<minimum-connection-count>100</minimum-connection-count>
------------------
Thanks you guys.
