Invalidating query cache entries table mysql Chat with porn private talk

Inno DB uses this primary key value to search for the row in the clustered index.If the primary key is long, the secondary indexes use more space, so it is advantageous to have a short primary key.

As mentioned before, possibly the internal/hidden Inno DB PK can be used to resolve this bug. And NDB also really really would like to be able to use it in this type of scenarios.You may also see "invalidating query cache entries (table)" as a symptom in the processlist.If you see that, check to see whether this is the possible root cause instead of giving full blame to only the query cache.for larger datasets this is unrealistic and will be doomed to fail.on master: mysql delete from t1 order by rand(); Query OK, 78130 rows affected (2.61 sec) on slave it takes 78130*78130 row reads to process (still running): ---TRANSACTION 0 1799, ACTIVE 731 sec, OS thread id 3672 fetching rows mysql tables in use 1, locked 1 153 lock struct(s), heap size 30704, 78278 row lock(s), undo log entries 10045 My SQL thread id 5, query id 16 Reading event from the relay log Number of rows inserted 78130, updated 0, deleted 10045, read 370899004 0.00 inserts/s, 0.00 updates/s, 16.20 deletes/s, 600754.85 reads/s How to repeat: #setup rbr master and slave.

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