-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 29/05/08 07:14 AM, Dirk H. Schulz wrote: > Hello nagios fellows, > > I am running a nagios test environment on CentOS 4 and RHEL4/5, and came to > recognize some errors in check_mem.pl: > > - if used with option -f (checks free memory), it does not report back free > memory - the amount reported corresponds to cached memory. > - if used with option -u (checks used memory), it reports wrong > percentages, e.g. if 2.6 GB of 4 GB on a 32Bit System is used it reports 93 > % used. > > Are these known errors? I did not find much relating to that. > Is there a replacement for check_mem.pl?
I never used check_mem, be be aware that Linux can cache all free memory while still having is available for any process than need it. On some servers with very stable loads the "free" memory can get down to only a few megs (out of many GBs) but if you take into account cached memory that can be freed up any time the picture is much different. I wrote this memory check (using Nagios::Plugin) that can take absolute values and percentages as thresholds. It parses free(1) and returns the amount of memory available, counting cached memory into account. It also let you choose the unit to display free memory with: http://www.nagiosexchange.org/cgi-bin/page.cgi?g=1433.html;d=1 Since your system will always keep some memory in buffers/cache you should take this into account when setting thresholds. Thomas -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFIPqU/6dZ+Kt5BchYRAmDbAKCYXpcxpxqP15Oc6n+QKYlu6dDVrgCgprZJ 6urqcEJuIGUdlNAuL9t+KtM= =EYq6 -----END PGP SIGNATURE----- ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Nagios-users mailing list Nagios-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nagios-users ::: Please include Nagios version, plugin version (-v) and OS when reporting any issue. ::: Messages without supporting info will risk being sent to /dev/null
