Hi!
I have a very confusing problem using MediaWiki 1.5.8,
PHP 4.3.10-16 (cgi-fcgi), MySQL 4.0.24_Debian-10sarge1-log and
Apache 2.0.54 on Debian Sarge.
Sometimes PHP processes are just freezing and hold in memory. If too
many from them are gathered, the server is running out of RAM and
everything is standing. I tried to switch over to fastCGI (mod_php isn't
possible due to security reasons), but there are still this kind of
processes left:
$ ps ux
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND
perrype 17856 0.0 0.6 33512 5792 ? S 07:45 0:00 /usr/bin/php4-cgi
perrype 17861 0.0 0.6 32968 5824 ? S 07:45 0:00 /usr/bin/php4-cgi
perrype 17863 0.0 0.6 33920 5796 ? S 07:45 0:00 /usr/bin/php4-cgi
perrype 17865 0.0 0.6 33180 5824 ? S 07:45 0:00 /usr/bin/php4-cgi
perrype 17893 0.0 0.6 32748 5792 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17894 0.0 0.6 32752 5776 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17897 0.0 0.6 33632 5832 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17899 0.0 0.6 32744 5792 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17901 0.0 0.6 33060 5824 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17903 0.0 0.6 31272 5576 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17911 0.0 0.6 33180 5820 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17943 0.0 0.6 32876 5824 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17945 0.0 0.6 31272 5576 ? S 07:47 0:00 /usr/bin/php4-cgi
perrype 17947 0.0 0.6 32992 5824 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17953 0.0 0.6 33076 5824 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17957 0.0 0.6 31272 5576 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17958 0.0 0.6 31272 5576 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17959 0.0 0.6 31272 5576 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17960 0.0 0.6 31272 5576 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17965 0.0 0.6 31272 5576 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 17983 0.0 0.6 31272 5576 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 18001 0.0 0.6 32740 5768 ? S 07:48 0:00 /usr/bin/php4-cgi
perrype 18288 0.0 0.6 31272 5576 ? S 07:56 0:00 /usr/bin/php4-cgi
perrype 18525 0.0 0.6 31272 5576 ? S 08:00 0:00 /usr/bin/php4-cgi
perrype 18538 0.0 0.6 31272 5576 ? S 08:00 0:00 /usr/bin/php4-cgi
perrype 21330 0.0 1.0 32788 9476 ? S 14:49 0:00 /usr/bin/php4-cgi
perrype 21332 0.0 1.0 32736 9720 ? S 14:49 0:00 /usr/bin/php4-cgi
perrype 21334 0.0 1.2 33416 11088 ? S 14:49 0:00 /usr/bin/php4-cgi
perrype 21338 0.0 0.6 31272 5576 ? S 14:49 0:00 /usr/bin/php4-cgi
perrype 21339 0.0 1.2 32916 11320 ? S 14:49 0:00 /usr/bin/php4-cgi
...
You see the first are started at 07:47 allmost 8 hours ago!
stracing some of these processes gives:
$ strace -p 17856
Process 17856 attached - interrupt to quit
write(1, "\2\307>\330\3432\330\243^\262\270\21\354qy\315\242^\263"..., 30507
<unfinished ...>
Process 17856 detached
$ strace -p 17861
Process 17861 attached - interrupt to quit
write(1, "\246X]\204h\316\216?|8x\367\303\307\203\363\257\237m\377"..., 846
<unfinished ...>
Process 17861 detached
Any ideas?
Thanks in advance,
Alexander Nofftz