You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@tomcat.apache.org by bu...@apache.org on 2005/11/11 18:07:36 UTC
DO NOT REPLY [Bug 37470] New: -
mod_jk doesn�t scale well with hundreds of sites - interferes with CGI handling
DO NOT REPLY TO THIS EMAIL, BUT PLEASE POST YOUR BUG�
RELATED COMMENTS THROUGH THE WEB INTERFACE AVAILABLE AT
<http://issues.apache.org/bugzilla/show_bug.cgi?id=37470>.
ANY REPLY MADE TO THIS MESSAGE WILL NOT BE COLLECTED AND�
INSERTED IN THE BUG DATABASE.
http://issues.apache.org/bugzilla/show_bug.cgi?id=37470
Summary: mod_jk doesn�t scale well with hundreds of sites -
interferes with CGI handling
Product: Tomcat 5
Version: Unknown
Platform: PC
OS/Version: Linux
Status: NEW
Severity: major
Priority: P2
Component: Native:JK
AssignedTo: tomcat-dev@jakarta.apache.org
ReportedBy: reweiner@yahoo.com
1. Create a httpd.conf with 1500 websites. Every VirtualHost section should be
like this:
<VirtualHost xxxx>
ServerName testXXX
ServerAlias testXXX.com
ServerAdmin webmaster@testXXX.com
DocumentRoot /home/testXXX/public_html
ScriptAlias /cgi-local/ /home/testXXX/public_html/cgi-local/
SetEnv LOG_SUBDIR testXXX
SuexecUserGroup testXXX testXXX
JkMount /*.jsp ajp13
JkMount /servlet/* ajp13
</VirtualHost>
<VirtualHost xxxx:443>
ServerName testXXX
ServerAlias testXXX.com
ServerAdmin webmaster@testXXX.com
DocumentRoot /home/testXXX/public_html
ScriptAlias /cgi-local/ /home/testXXX/public_html/cgi-local/
SetEnv LOG_SUBDIR testXXX
SuexecUserGroup testXXX testXXX
JkMount /*.jsp ajp13
JkMount /servlet/* ajp13
</VirtualHost>
2. create a simple script:
#!/usr/bin/perl
print "Content-Type: text/html\n\n";
print "Test!!";
3. execute on the web
Actual results:
In a Dual Xeon, zero load, it takes 2 seconds to run.
I did some straces:
strace -T -f -p xxxxx
[pid 30864] read(4, "", 4096) = 0 <0.000022>
[pid 30864] close(4) = 0 <0.000016>
[pid 30864] read(3, "", 4096) = 0 <0.000014>
[pid 30864] close(3) = 0 <0.000012>
[pid 30864] write(1, "Content-Type: text/html\n\nTest"..., 72) = 72 <0.000020>
[pid 30785] <... poll resumed> [{fd=26, events=POLLIN, revents=POLLIN}, {fd=28,
events=POLLIN}], 2, 30000) = 1 <2.120682>
In "LogLevel debug", I see:
[Fri Nov 11 12:55:50 2005] [25756:39072] [debug] jk_cleanup_shmem::mod_jk.c
(1761): Shmem cleanup
[Fri Nov 11 12:55:53 2005] [25756:39072] [debug] jk_cleanup_shmem::mod_jk.c
(1761): Shmem cleanup
(> 2 seconds !!)
If I remove all the JkMount mapping, the CGI execution is very fast. So there
is definitely an issue with mod_jk.
with mod_jk -> more than 2 seconds
without mod_jk -> a few milliseconds
OBS: Those tests were done in a server without load. I simply turn apache
2.0.52 on and requested the CGI execution.
I can test any patch.
--
Configure bugmail: http://issues.apache.org/bugzilla/userprefs.cgi?tab=email
------- You are receiving this mail because: -------
You are the assignee for the bug, or are watching the assignee.
---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@tomcat.apache.org
For additional commands, e-mail: dev-help@tomcat.apache.org