Mailing List Archive

https://bz.apache.org/bugzilla/show_bug.cgi?id=66217

Bug ID: 66217
Summary: RLimitMEM doesn't work
Product: Apache httpd-2
Version: 2.4.53
Hardware: All
OS: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Core
Assignee: bugs@httpd.apache.org
Reporter: aguidrevitch@gmail.com
Target Milestone: ---

Hi there,

I'm trying to limit memory usage by Apache 2.4, and RLimitMEM doesn't work. No
matter where I place RLimitMEM, limits stay the same, here is PHP script called
from within apache2 with RLimitMEM set to 6442450944 (6GB)

core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
scheduling priority (-e) 0
file size (blocks, -f) unlimited
pending signals (-i) 30534
max locked memory (kbytes, -l) 65536
max memory size (kbytes, -m) unlimited
open files (-n) 8192
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
real-time priority (-r) 0
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 30534
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited

Here is var_dump(posix_getrlimit());
array (size=20)
'soft core' => int 0
'hard core' => string 'unlimited' (length=9)
'soft data' => string 'unlimited' (length=9)
'hard data' => string 'unlimited' (length=9)
'soft stack' => int 8388608
'hard stack' => string 'unlimited' (length=9)
'soft totalmem' => string 'unlimited' (length=9)
'hard totalmem' => string 'unlimited' (length=9)
'soft rss' => string 'unlimited' (length=9)
'hard rss' => string 'unlimited' (length=9)
'soft maxproc' => int 30534
'hard maxproc' => int 30534
'soft memlock' => int 67108864
'hard memlock' => int 67108864
'soft cpu' => string 'unlimited' (length=9)
'hard cpu' => string 'unlimited' (length=9)
'soft filesize' => string 'unlimited' (length=9)
'hard filesize' => string 'unlimited' (length=9)
'soft openfiles' => int 8192
'hard openfiles' => int 8192

I decided to look into the code, httpd/os/unix/unixd.c, function
ap_unixd_set_rlimit and I can't see call to setrlimit. I'm not a C coder, so I
suppose modifying struct returned by getrlimit is enough?

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