On Wed, Oct 12, 2011, Brandon Phelps wrote: > I use Nagios to monitor various things on a few servers and have > recently set up a hot-standby server and would obviously like to > include the state of streaming replication in my monitoring. > > [...] > > The confusion I have is how exactly can I determine just how far > behind the replication is during loads? Currently with no traffic > (servers not in production yet) sent_location on the master is > "A/10018560" and pg_last_xlog_receive_location() on the standby also > returns "A/10018560"... How far apart can these be for me to start > worrying? I could make a bit more sense of all this if they were > simple timestamps or something, but the hex values returned boggle my > mind. > > Any advice on these issues or other tips on monitoring the replication > would be greatly appreciated. Brandon: I'm using this script for Mon, you should be able to adapt it to whatever language and monitoring system you please. http://www.martini.nu/misc/db_replication.monitor.txt -- Mahlon E. Smith http://www.martini.nu/contact.html
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