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John:
Ive seen the primary sql servers for 1,2/5 lagged
about 12 hours for the
last day.
One of the s1 servers (thyme) was lagging; probably because a user
allocated a very large MEMORY table and caused the server to swap. I
restarted and server (and fixed the limit on MEMORY table size), and it
seems to be doing better now.
I don't see any particularly serious lag for s2:
<http://munin.toolserver.org/Database/daphne/mysql_replication.html>
Unfortunately we don't have replication lag graphs for s5 at the moment.
If there was lag there, it's probably because the s2/s5 server (daphne)
is somewhat overloaded, since there's only one of them, while other
clusters have two servers.
While the fast servers are current.
There are no fast servers anymore; sql-sX-rr and sql-sX-fast both point
to both servers for each cluster (except s2/s5).
- river.
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