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codypo/monitex

Created April 6, 2011 14:21
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Monit example for restarting a service on excessive memory consumption
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monitex
# Relevant example from our monitrc file.
check process couchdb with pidfile /usr/local/var/run/couchdb/couchdb.pid
start program = "/etc/init.d/couchdb start"
stop program = "/etc/init.d/couchdb stop"
if cpu > 60% for 2 cycles then alert
if cpu > 80% for 5 cycles then restart
if memory usage > 70% MB for 5 cycles then restart
@jmodjeska
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Try totalmem. Example httpd rule (Amazon Linux/CentOS/RHEL):

check process httpd with pidfile /var/run/httpd/httpd.pid
    start program = "/usr/sbin/httpd -k start"
    stop program = "/usr/sbin/httpd -k stop"
    if totalmem > 100 MB for 2 cycles then alert
    if totalmem > 1000 MB for 2 cycles then restart

@mactyr
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mactyr commented Sep 16, 2020

In the original example, if memory usage > 70% MB for 5 cycles then restart seems ambiguous. It looks like it should either be % or MB in the documentation, not both. I would guess that in this case monit would use the % and ignore the MB (or maybe throw an error?) but I'm not sure and it doesn't seem like a good idea to have the ambiguity!

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