Mysql replication invalidating query cache entries table internationaldatinglawyer com

It's constantly in the "invalidating query cache entries (table)" thread state even though I have query_cache_type = 0 (i.e., OFF).I see mysql cranking away with 99% CPU usage, whereas when I use statement-based replication it is decidely IO bound, with barely any CPU usage that isn't IO wait.Alternatively it might want to use some synchronizing/locking mechanism; that would of course induce latency as data must cross the Atlantic.

mysql replication invalidating query cache entries table-41

It often happens to see and hear of replication SQL thread almost always in state “invalidating query cache entries (table)” .

While sometime this works, others don’t; the query cache is “disabled” and you still see the SQL thread in state “invalidating query cache entries (table)”.

I had hoped for the opposite, and this seems like buggy behavior... I can't stop and start the replication at all without breaking the replication.

If I do "stop slave" and then "start slave" again it immediately has an error like this, seemingly for random tables that have been written to (not one in particular): Could not execute Write_rows event on table XXX; Duplicate entry 'YYY' for key 'ZZZ', Error_code: 1062; handler error HA_ERR_FOUND_DUPP_KEY; the event's master log binlog.000003, end_log_pos 704849 I have scoured the bug reports and found nothing to explain either of these. I'm running the Linux (AMD64 / Intel EM64T) build of 5.1.25 on a xeon box...nothing that unusual about my environment or database. If nobody has ideas I suppose I will file bug reports, but these are such general failures I don't know what to say in them other than "it don't work".

The amount of trouble they went into because of that setup, and in spite of my counter-recommendations, led to many ruined weekends and holidays.

It's a synchronized master replication solution, and I hear it works over WAN.

In fact, with RBR there is a binlog event for each modified row, thus the mutex is acquired for every row.

I'm attempting to switch to row-based replication but cannot get it (either default MIXED mode or forced ROW) to work.

I've got a Master - Master replication setup and it worked fine for a couple of days but I keep getting: Duplicate entry errors after a few days...


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