For referance, the problem i am seeing is that even though i have configured
a load of modules to be preloaded, they are not being preloaded, or at least not
being shared.
This happened after moving to a new server running the same
redhat 9 but with different kernels and glibc's. I'm betting thats where the
problem is but i am stumped as to how to trace and solve the problem. Before
moving, most of the memory was well shared for a good while.
Has anyone had similar problems with RedHat 9?
It appears to be one of two things;
1. mod_perl is not loading modules before the fork()'s.
2. fork() is not
correctly identifing pages which can be shared.
However, all the code does appear to be loaded into the parent apache process
its just seperated during the fork.
mod_perl / apache configured with
perl Makefile.PL APACHE_SRC=../apache_1.3.29/src USE_APACI=1 PERL_INIT=1
PERL_STACKED_HANDLERS=1 ALL_HOOKS=1 DO_HTTPD=1 APACI_ARGS='--prefix=/usr
--activate-module=src/modules/gzip/mod_gzip.a --enable-module=env
--activate-module=src/modules/php4/libphp4.a
--activate-module=src/modules/perl/libperl.a --enable-module=log_config
--disable-module=log_agent --disable-module=log_referer --enable-module=mime
--enable-module=negotiation --enable-module=include --disable-module=autoindex
--enable-module=dir --enable-module=cgi --enable-module=alias
--enable-module=rewrite --enable-module=headers --enable-module=access
--enable-module=auth --enable-module=expires --enable-module=setenvif
--disable-module=userdir --disable-module=status --disable-module=info
--disable-module=asis --enable-suexec --suexec-docroot=/var/www
--suexec-caller=apache'
Useful stuff...
------- httpd.conf #####################
PerlModule Apache::Registry Apache::RegistryLoader DBD::mysql BSD::Resource
DBI
PerlModule Storable Text::Kakasi Encode::Encoding Apache::DBI
Carp
PerlModule IPC::Shareable Jcode IPC::SysV Encode Encode::Alias
Lingua::JA::Romaji
PerlRequire "/var/www/startup.pl"
<Files anime.manga>
SetHandler
perl-script
PerlHandler
Apache::Registry
Options
ExecCGI
PerlSendHeader
On
</Files>
------- /var/www/startup.pl #####################
BEGIN {
use lib qw(/var/www/);
use strict;
#use
Apache::Registry;
use lib::ModHTML ();
use IPC::Shareable ();
use drivers::index
();
.......
use
drivers::anistuff ();
use Apache::DBI;
# use DBI;
use Apache::RegistryLoader;
Apache::RegistryLoader->new->handler("/anime.manga","/var/www/html/anime.manga");
Apache::DBI->connect_on_init("DBI:mysql:database=xxxxx",
"xxxxx","xxxxxx",
{
PrintError => 1, #
warn() on errors
RaiseError => 0, # don't die on
error
AutoCommit => 1, # commit executes
immediately
}
);
}
1;
}
------- TOP #####################
(apache was just started)
PID USER
PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME CPU
COMMAND
25270 apache 15 0 12772 12M
3152 S 0.0 2.5 0:00 0
httpd
25255 apache 23 0 12640 12M
3120 S 0.0 2.4 0:00 0
httpd
25284 apache 15 0 12620 12M
3144 S 1.1 2.4 0:00 0
httpd
25254 root 15 0 11196
10M 2804 S 1.0 2.2
0:05 0 httpd (parent)
------- pmap - parent#####################
(other junk same as below)
mapped: 15720 KB writable/private:
8904 KB shared: 72 KB
------- pmap - child #####################
httpd(25270)
08048000 (1600 KB) r-xp (03:03
131451) /usr/sbin/httpd
081d8000 (88
KB) rw-p (03:03 131451)
/usr/sbin/httpd
081ee000 (9384 KB) rwxp (00:00
0)
40000000 (84 KB) r-xp (03:01
539705) /lib/ld-2.3.2.so
40015000 (4
KB) rw-p (03:01 539705)
/lib/ld-2.3.2.so
40016000 (4 KB)
rw-p (00:00 0)
40017000 (12 KB) r-xp
(03:03 929343)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/BSD/Resource/Resource.so
4001a000
(4 KB) rw-p (03:03 929343)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/BSD/Resource/Resource.so
4001b000
(12 KB) r-xp (03:03 439898)
/usr/lib/perl5/5.8.2/i686-linux/auto/Fcntl/Fcntl.so
4001e000 (4
KB) rw-p (03:03 439898)
/usr/lib/perl5/5.8.2/i686-linux/auto/Fcntl/Fcntl.so
4001f000 (8
KB) r-xp (03:03 848151)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/Text/Kakasi/Kakasi.so
40021000
(4 KB) rw-p (03:03 848151)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/Text/Kakasi/Kakasi.so
40022000
(4 KB) rw-p (00:00 0)
40023000 (20
KB) r-xp (03:01 539626)
/lib/libcrypt-2.3.2.so
40028000 (4
KB) rw-p (03:01 539626)
/lib/libcrypt-2.3.2.so
40029000 (156 KB) rw-p
(00:00 0)
40050000 (60 KB) r-xp (03:01
539648) /lib/libresolv-2.3.2.so
4005f000 (4
KB) rw-p (03:01 539648)
/lib/libresolv-2.3.2.so
40060000 (8
KB) rw-p (00:00 0)
40062000 (132
KB) r-xp (03:01 637731)
/lib/tls/libm-2.3.2.so
40083000 (4
KB) rw-p (03:01 637731)
/lib/tls/libm-2.3.2.so
40084000 (12 KB)
r-xp (03:01 539628) /lib/libdl-2.3.2.so
40087000 (4
KB) rw-p (03:01 539628)
/lib/libdl-2.3.2.so
40088000 (72 KB) r-xp
(03:01 539632) /lib/libnsl-2.3.2.so
4009a000 (4
KB) rw-p (03:01 539632)
/lib/libnsl-2.3.2.so
4009b000 (8
KB) rw-p (00:00 0)
4009d000 (24
KB) r-xp (03:03 65209)
/usr/lib/libgdbm.so.2.0.0
400a3000 (4
KB) rw-p (03:03
65209) /usr/lib/libgdbm.so.2.0.0
400a4000 (4
KB) rw-p (00:00 0)
400a5000 (932
KB) r-xp (03:03 945623)
/usr/lib/perl5/5.8.2/i686-linux/CORE/libperl.so
4018e000 (40
KB) rw-p (03:03 945623)
/usr/lib/perl5/5.8.2/i686-linux/CORE/libperl.so
40198000 (12
KB) rw-p (00:00 0)
4019b000 (8
KB) r-xp (03:01 539654)
/lib/libutil-2.3.2.so
4019d000 (4
KB) rw-p (03:01 539654)
/lib/libutil-2.3.2.so
4019e000 (4
KB) rw-p (00:00 0)
4019f000 (2048
KB) r--p (03:03 196819)
/usr/lib/locale/locale-archive
4039f000 (88
KB) r-xp (03:03 115375)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/DBI/DBI.so
403b5000 (4
KB) rw-p (03:03 115375)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/DBI/DBI.so
403b6000 (60
KB) r-xp (03:03 929331)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/DBD/mysql/mysql.so
403c5000 (8
KB) rw-p (03:03 929331)
/usr/lib/perl5/site_perl/5.8.2/i686-linux/auto/DBD/mysql/mysql.so
403c7000
(116 KB) r-xp (03:03 49195)
/usr/lib/mysql/libmysqlclient.so.12.0.0
403e4000 (16
KB) rw-p (03:03 49195)
/usr/lib/mysql/libmysqlclient.so.12.0.0
403e8000 (48
KB) r-xp (03:03 65251)
/usr/lib/libz.so.1.1.4
403f4000 (8
KB) rw-p (03:03
65251) /usr/lib/libz.so.1.1.4
403f6000 (56
KB) r-xp (03:03 848128)
/usr/lib/perl5/5.8.2/i686-linux/auto/Storable/Storable.so
40404000 (4
KB) rw-p (03:03 848128)
/usr/lib/perl5/5.8.2/i686-linux/auto/Storable/Storable.so
40405000 (32
KB) r-xp (03:03 65367)
/usr/lib/libkakasi.so.2.1.0
4040d000 (32
KB) rw-p (03:03 65367)
/usr/lib/libkakasi.so.2.1.0
40415000 (232 KB)
rw-p (00:00 0)
4044f000 (24 KB) r-xp
(03:03 945619)
/usr/lib/perl5/5.8.2/i686-linux/auto/Encode/Encode.so
40455000 (4
KB) rw-p (03:03 945619)
/usr/lib/perl5/5.8.2/i686-linux/auto/Encode/Encode.so
40456000 (12
KB) r-xp (03:03 782934)
/usr/lib/perl5/5.8.2/i686-linux/auto/IPC/SysV/SysV.so
40459000 (4
KB) rw-p (03:03 782934)
/usr/lib/perl5/5.8.2/i686-linux/auto/IPC/SysV/SysV.so
4045a000 (12
KB) r-xp (03:03 798327)
/usr/lib/perl5/5.8.2/i686-linux/auto/Filter/Util/Call/Call.so
4045d000 (4
KB) rw-p (03:03 798327)
/usr/lib/perl5/5.8.2/i686-linux/auto/Filter/Util/Call/Call.so
4045e000 (24
KB) r--s (03:03 407433)
/usr/lib/gconv/gconv-modules.cache
40464000 (12
KB) r-xp (03:03 521487)
/usr/lib/perl5/5.8.2/i686-linux/auto/Time/HiRes/HiRes.so
40467000 (4
KB) rw-p (03:03 521487)
/usr/lib/perl5/5.8.2/i686-linux/auto/Time/HiRes/HiRes.so
40468000 (48
KB) rw-s (00:04 786432)
/SYSV00000000
40474000 (44 KB) r-xp
(03:01 539638) /lib/libnss_files-2.3.2.so
4047f000 (4
KB) rw-p (03:01 539638)
/lib/libnss_files-2.3.2.so
4048c000 (16
KB) r-xp (03:01 539636)
/lib/libnss_dns-2.3.2.so
40490000 (4
KB) rw-p (03:01 539636)
/lib/libnss_dns-2.3.2.so
42000000 (1216 KB) r-xp
(03:01 637971) /lib/tls/libc-2.3.2.so
42130000 (12
KB) rw-p (03:01 637971)
/lib/tls/libc-2.3.2.so
42133000 (12 KB)
rw-p (00:00 0)
bfff8000 (32 KB) rwxp
(00:00 0)
mapped: 16972 KB writable/private: 10140 KB shared: 72
KB
------- Linked against ###################
libcrypt.so.1 =>
/lib/libcrypt.so.1 (0x40023000)
libresolv.so.2 => /lib/libresolv.so.2
(0x40050000)
libm.so.6 =>
/lib/tls/libm.so.6 (0x40062000)
libdl.so.2 => /lib/libdl.so.2
(0x40084000)
libnsl.so.1 =>
/lib/libnsl.so.1 (0x40088000)
libgdbm.so.2 => /usr/lib/libgdbm.so.2
(0x4009d000)
libperl.so =>
/usr/lib/perl5/5.8.2/i686-linux/CORE/libperl.so
(0x400a5000)
libutil.so.1 =>
/lib/libutil.so.1 (0x4019b000)
libc.so.6 => /lib/tls/libc.so.6
(0x42000000)
/lib/ld-linux.so.2
=> /lib/ld-linux.so.2 (0x40000000)
