Hi,
I'm using Stas Bekman's excellent Apache::VMonitor module to help me
decrease my mod_perl child process memory usage. I was working on
preloading all of my perl modules and scripts in a startup.pl script when
I noticed that the amount of shared memory seemed very low. Immediately
after I make an Oracle database connection, the child jumps from a size of
3.6M (2.4M shared) to 17.4M (3.4M shared). The child process slowly grows
to 22.2M (3.4M shared). The loaded libs Sizes total 13.6M.
Shouldn't the libs load into shared memory? If so, how?
Here's a snippet from Apache::VMonitor.
Loaded libs Sizes: (in bytes)
5800677 ( 5.5M) : /ora1/oracle/product/8.1.5/lib/libclntsh.so.8.0
4118299 ( 3.9M) : /lib/libc-2.1.2.so
1134094 ( 1.1M) : /usr/local/apache_perl/bin/httpd_perl
540120 ( 527k) : /lib/libm-2.1.2.so
372604 ( 364k) : /lib/libnsl-2.1.2.so
344890 ( 337k) : /lib/ld-2.1.2.so
254027 ( 248k) : /lib/libnss_nis-2.1.2.so
253826 ( 248k) : /lib/libnss_nisplus-2.1.2.so
247381 ( 242k) : /lib/libpthread-0.8.so
247348 ( 242k) : /lib/libnss_files-2.1.2.so
162740 ( 159k) : /usr/lib/libglib-1.2.so.0.0.5
81996 ( 80k) :
/usr/lib/perl5/site_perl/5.005/i386-linux/auto/DBD/Oracle/Oracle.so
74663 ( 73k) : /lib/libdl-2.1.2.so
64595 ( 63k) : /lib/libcrypt-2.1.2.so
63848 ( 62k) : /usr/lib/perl5/site_perl/5.005/i386-linux/auto/DBI/DBI.so
60026 ( 59k) : /usr/lib/libgtop_sysdeps.so.1.0.2
58088 ( 57k) :
/usr/lib/perl5/site_perl/5.005/i386-linux/auto/Date/Calc/Calc.so
51146 ( 50k) :
/usr/lib/perl5/site_perl/5.005/i386-linux/auto/Storable/Storable.so
48500 ( 47k) : /usr/lib/perl5/site_perl/5.005/i386-linux/auto/GTop/GTop.so
46795 ( 46k) : /usr/local/apache_perl/libexec/mod_include.so
32545 ( 32k) : /usr/lib/gconv/ISO8859-1.so
31927 ( 31k) : /usr/lib/libgtop.so.1.0.2
29970 ( 29k) : /usr/share/locale/en_US/LC_COLLATE
28657 ( 28k) : /usr/lib/libgdbm.so.2.0.0
27405 ( 27k) : /usr/local/apache_perl/libexec/mod_status.so
24409 ( 24k) :
/usr/lib/perl5/site_perl/5.005/i386-linux/auto/Apache/Scoreboard/Scoreboard.so
22970 ( 22k) :
/usr/lib/perl5/5.00503/i386-linux/auto/Data/Dumper/Dumper.so
17732 ( 17k) : /usr/lib/libgtop_common.so.1.0.2
14748 ( 14k) : /usr/lib/perl5/5.00503/i386-linux/auto/IO/IO.so
11137 ( 11k) :
/usr/lib/perl5/site_perl/5.005/i386-linux/auto/Time/HiRes/HiRes.so
10764 ( 11k) : /usr/local/apache_perl/libexec/mod_usertrack.so
10428 ( 10k) : /usr/share/locale/en_US/LC_CTYPE
9827 ( 10k) : /usr/lib/perl5/5.00503/i386-linux/auto/Fcntl/Fcntl.so
4847 ( 5k) : /ora1/oracle/product/8.1.5/lib/libskgxp8.so
508 ( 1k) : /usr/share/locale/en_US/LC_TIME
93 ( 1k) : /usr/share/locale/en_US/LC_MONETARY
44 ( 1k) : /usr/share/locale/en_US/LC_MESSAGES/SYS_LC_MESSAGES
27 ( 1k) : /usr/share/locale/en_US/LC_NUMERIC
Thanks for your help!
Bob Foster
