[ClusterLabs] Antw: crm_report consumes all available RAM

[Andrew Beekhof]

> On 8 Sep 2015, at 10:18 pm, Ulrich Windl <Ulrich.Windl at rz.uni-regensburg.de> wrote:
> 
>>>> Vladislav Bogdanov <bubble at hoster-ok.com> schrieb am 08.09.2015 um 14:05 in
> Nachricht <55EECEFB.8050001 at hoster-ok.com>:
>> Hi,
>> 
>> just discovered very interesting issue.
>> If there is a system user with very big UID (80000002 in my case),
>> then crm_report (actually 'grep' it runs) consumes too much RAM.
>> 
>> Relevant part of the process tree at that moment looks like (word-wrap off):
>> USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
>> ...
>> root     25526  0.0  0.0 106364   636 ?        S    12:37   0:00          \_ 
>> /bin/sh /usr/sbin/crm_report --dest=/var/log/crm_report -f 0000-01-01 00:00:00
>> root     25585  0.0  0.0 106364   636 ?        S    12:37   0:00             
>> \_ bash /var/log/crm_report/collector
>> root     25613  0.0  0.0 106364   152 ?        S    12:37   0:00             
>>     \_ bash /var/log/crm_report/collector
>> root     25614  0.0  0.0 106364   692 ?        S    12:37   0:00             
>>         \_ bash /var/log/crm_report/collector
>> root     27965  4.9  0.0 100936   452 ?        S    12:38   0:01             
>>         |   \_ cat /var/log/lastlog
>> root     27966 23.0 82.9 3248996 1594688 ?     D    12:38   0:08             
>>         |   \_ grep -l -e Starting Pacemaker
>> root     25615  0.0  0.0 155432   600 ?        S    12:37   0:00             
>>         \_ sort -u
>> 
>> ls -ls /var/log/lastlog shows:
>> 40 -rw-r--r--. 1 root root 23360000876 Sep  8 04:36 /var/log/lastlog
>> 
>> That is sparse binary file, which consumes only 40k of disk space.
>> At the same time its size is 23GB, and grep takes all the RAM trying to
>> grep a string from a 23GB of mostly zeroes without new-lines.
>> 
>> I believe this is worth fixing,

Shouldn’t this be directed to the grep folks?