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| author | Rusty Russell <rusty@rustcorp.com.au> | 2010-02-09 12:46:35 +1030 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2010-02-09 12:46:35 +1030 |
| commit | 34b8b98078b9d956bb6560f0004b9f4b64af59d7 (patch) | |
| tree | e56e7b511b18542ff2be5ec5c12e00e722ca5721 /ctdb/config/events.d | |
| parent | 2406733ed2490fa2b1b2c57c155fae975c6e243e (diff) | |
| download | samba-34b8b98078b9d956bb6560f0004b9f4b64af59d7.tar.gz samba-34b8b98078b9d956bb6560f0004b9f4b64af59d7.tar.xz samba-34b8b98078b9d956bb6560f0004b9f4b64af59d7.zip | |
event scripts: add logging for low memory conditions
We should never enter swap; if we do, show the memory state of the machine and the process list. This will help us diagnose what caused the condition before it's too late and the box starts OOM-killing processes.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
(This used to be ctdb commit 627a6d67a0e9e61f8713e62695b3518c51909230)
Diffstat (limited to 'ctdb/config/events.d')
| -rwxr-xr-x | ctdb/config/events.d/00.ctdb | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/ctdb/config/events.d/00.ctdb b/ctdb/config/events.d/00.ctdb index 1d4c1459a8..ed8f9f2126 100755 --- a/ctdb/config/events.d/00.ctdb +++ b/ctdb/config/events.d/00.ctdb @@ -29,11 +29,21 @@ case "$1" in ;; monitor) + # We should never enter swap, so SwapTotal == SwapFree. + if [ -n "`grep '^Swap\(Total\|Free\)' /proc/meminfo | uniq -s 10 -u`" ]; then + echo We are swapping: + cat /proc/meminfo + ps auxfww + fi + # monitor that we are not running out of memory [ -z "$CTDB_MONITOR_FREE_MEMORY" ] || { FREE_MEM=`free -m | grep "buffers/cache" | while read A B C D ;do /bin/echo -n $D ; done` [ `expr "$FREE_MEM" "<" "$CTDB_MONITOR_FREE_MEMORY"` != "0" ] && { echo "OOM. Free:$FREE_MEM while CTDB treshold is $CTDB_MONITOR_FREE_MEMORY" + cat /proc/meminfo + ps auxfww + echo m > /proc/sysrq-trigger ctdb disable sleep 3 ctdb shutdown |