From: [EMAIL PROTECTED]
Operating system: Linux 7.2
PHP version: 4.0.6
PHP Bug Type: LDAP related
Bug description: httpd process severely leaks memory for large LDAP queries
I've installed apache-1.3.20-16 , php-4.0.6-7 and php-ldap-4.0.6-7 , all
via the Redhat 7.2 RPMs.
I've also written a simple script to do performance testing against an LDAP
server running on the same machine. The script itself runs fine, but the
memory usage of httpd quickly balloons with each iteration, decreasing the
performance. After running the script for only about 10 times or so, httpd
has used a great deal of memory and swap on the machine and stops
responding. The init script needs to run twice to stop the server, which
frees the memory.
The only thing that shows up in the httpd error.log is a few lines of:
[warn] child process x still did not exit, sending a SIGTERM
The machine has 512MB each of RAM and swap. The LDAP database ldif is
about 7M in size, with about 8k entries.
Please reply if there is any extra information that could be provided. We
had looked forward to developing our DNS application on PHP, and would
still like to make this happen if possible.
Here's the revelant portion of the script:
$queries = array("masterserver=ns2so.cg.shawcable.net",
"(|(masterserver=ns2so.cg.shawcable.net)(secondaryserver=ns2so.cg.shawcable.net))",
"objectclass=*");
foreach ( $queries as $key => $query ) {
echo "<LI>Starting query \"".$query."\"...<BR>";
flush();
$start_time = posix_times();
$search_session = ldap_search($ldap_link_id,
$LDAP_ROOT_DN[$LDAP_SERVER_ID] , "$query" );
if ( $search_session ) {
$search_results = ldap_get_entries($ldap_link_id,$search_session);
} else {
page_severe_error("Test failed: ".my_ldap_error());
}
$end_time = posix_times();
$elapsed_time = ($end_time['ticks'] - $start_time['ticks']) / 100.0;
echo "Done. Elapsed time: <B>".$elapsed_time."s</B>.
<B>".$search_results['count']."</B> results returned.<BR><BR></LI>\n";
}
Here's the configure command, as reported by PHP:
'./configure' 'i386-redhat-linux' '--prefix=/usr' '--exec-prefix=/usr'
'--bindir=/usr/bin' '--sbindir=/usr/sbin' '--sysconfdir=/etc'
'--datadir=/usr/share' '--includedir=/usr/include' '--libdir=/usr/lib'
'--libexecdir=/usr/libexec' '--localstatedir=/var'
'--sharedstatedir=/usr/com' '--mandir=/usr/share/man'
'--infodir=/usr/share/info' '--prefix=/usr' '--with-config-file-path=/etc'
'--disable-debug' '--enable-pic' '--disable-rpath'
'--enable-inline-optimization' '--with-apxs=/usr/sbin/apxs' '--with-bz2'
'--with-curl' '--with-db3' '--with-dom' '--with-exec-dir=/usr/bin'
'--with-gd' '--with-gdbm' '--with-gettext' '--with-jpeg-dir=/usr'
'--with-mm' '--with-openssl' '--with-png' '--with-regex=system'
'--with-ttf' '--with-zlib' '--with-layout=GNU' '--enable-debugger'
'--enable-ftp' '--enable-magic-quotes' '--enable-safe-mode'
'--enable-sockets' '--enable-sysvsem' '--enable-sysvshm'
'--enable-track-vars' '--enable-yp' '--enable-wddx' '--without-mysql'
'--without-unixODBC' '--without-oracle' '--without-oci8' '--with-pspell'
'--with-xml'
--
Edit bug report at: http://bugs.php.net/?id=14274&edit=1
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