Hi, I recently upgraded our servers to mod_perl 1.24.1 so I decided to
give DSO mod_perl a try. And it now works perfectly, even with our perl
modules implementing core httpd configuration directives (Wich was broken
under DSO until 24.1)
So, I decided to start playing with restart/graceful too, thinking that DSO might solve
the problems of cleanly restarting a mod_perl server without loss of service...
Here is a bit of top while restarting my server a few times.... :
#INITIAL STARTUP
PID USER PRI NI SIZE SWAP RSS SHARE STAT LIB %CPU %MEM TIME COMMAND
17940 nobody 10 0 27592 0 26M 27376 S 0 0.0 2.6 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17941 nobody 10 0 27592 0 26M 27376 S 0 0.0 2.6 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17942 nobody 10 0 27592 0 26M 27376 S 0 0.0 2.6 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17943 nobody 10 0 27592 0 26M 27376 S 0 0.0 2.6 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17944 nobody 10 0 27592 0 26M 27380 S 0 0.0 2.6 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17939 root 10 0 27516 0 26M 27312 S 0 0.0 2.6 0:01
/usr/local/apache/bin/httpd -Dhttpd_perl
#RESTART #1
17971 nobody 5 0 40116 0 39M 39888 S 0 0.0 3.8 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17972 nobody 7 0 40116 0 39M 39888 S 0 0.0 3.8 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17973 nobody 9 0 40116 0 39M 39888 S 0 0.0 3.8 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17974 nobody 10 0 40116 0 39M 39888 S 0 0.0 3.8 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17975 nobody 10 0 40116 0 39M 39888 S 0 0.0 3.8 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17961 root 10 0 40040 0 39M 39816 S 0 0.0 3.8 0:03
/usr/local/apache/bin/httpd -Dhttpd_perl
#RESTART #2
17980 nobody 6 0 52640 0 51M 52404 S 0 0.6 5.0 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17981 nobody 13 0 52640 0 51M 52404 S 0 0.2 5.0 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17982 nobody 16 0 52640 0 51M 52404 S 0 0.0 5.0 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17983 nobody 18 0 52640 0 51M 52404 S 0 0.0 5.0 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17984 nobody 19 0 52640 0 51M 52404 S 0 0.0 5.0 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17961 root 19 0 52560 0 51M 52332 S 0 41.1 5.0 0:05
/usr/local/apache/bin/httpd -Dhttpd_perl
[...]
#RESTART #5
18007 nobody 8 0 90204 0 88M 89976 S 0 7.1 8.7 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
18008 nobody 9 0 90204 0 88M 89976 S 0 0.0 8.7 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
18009 nobody 10 0 90204 0 88M 89976 S 0 2.3 8.7 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
18010 nobody 11 0 90204 0 88M 89976 S 0 4.7 8.7 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
18011 nobody 15 0 90204 0 88M 89976 S 0 0.0 8.7 0:00
/usr/local/apache/bin/httpd -Dhttpd_perl
17961 root 15 0 90128 0 88M 89908 S 0 57.2 8.6 0:11
/usr/local/apache/bin/httpd -Dhttpd_perl
And everything apparently behaves fine and keeps on working, but my main question is
where is the 12Mb that adds to
each process on restart comes from ? What is hapenning ?
I know these issues have been brought before in the case of statically compiled-in
mod_perl, but doesn't restarting the
server freeing libperl.so and re-loading it freshly ?
Any information would be more than welcome ...
## My version info is :
Redhat 6.2 running on a i386 Linux 2.2.17
Server version: Apache/1.3.14 (Unix)
Server built: Oct 18 2000 14:00:36
perl5 (5.0 patchlevel 5 subversion 3)
mod_perl 1.24.1
/usr/local/apache/bin/httpd -l
Compiled-in modules:
http_core.c
mod_so.c
--
+-----------------------------------------------+
| Philippe M. Chiasson <[EMAIL PROTECTED]> |
| SmartWorker http://www.smartworker.org |
| IM : gozerhbe ICQ : gozer/18279998 |
+-----------------------------------------------+
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/usr/src/linux/fs/buffer.c
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