----- Original Message -----
> From: rik@stripped
> I may be wrong here, but I tend to interpret this as '140054029002496' is
> trying to get an exclusive lock on 0x78733f8, on which it already has an
> exclusive lock, and hence is deadlocked in some manner. Am I right there? How
> can this happen?
I'm not too hot on the internals, but yes, that seems likely.
> I certainly cannot reproduce a query which causes this,
You'd need at least two :-p
> and I had to kill -9
> the process, so nothing no running/long queries were written to the slow-query
> log. (On a side note: not even root / superuser could connect to the MySQL
check the max_user_connections setting, and set it a couple of notches lower than the
max_connections one. It basically says "only this much non-super users may connect" and
leaves the rest for super privileged users - which should only be admins, not
> instance, so there was no way to check which queries were actually running) If
> not, what should I look for in trying to determine the cause? (Added some
> extra monitor output below sig in case it's needed).
Well... Your innodb status, if you can connect :-)
Can't be bothered to write down the reasoning, but the simple way to avoid deadlocks is to
always, in all processes, lock all tables in the same order - alphabetically, for
instance. that way deadlock gets pre-empted before it can occur.
Bier met grenadyn
Is als mosterd by den wyn
Sy die't drinkt, is eene kwezel
Hy die't drinkt, is ras een ezel