Am 31.05.2012 09:13, schrieb Roland RoLaNd:
> Dear all,I have a task to anonymize data in 82000
> record (for the time being)i've tested my script against
> about 30 of them, and it takes about 2.4 sec for each
> query to be executed.
provide table structure and query example
sounds like a bad design without key
how can 30 updates take 2.4 seconds?
> i'm seeking help with the following:
> - what's the best way to run such a script without affecting the DB server
> performance?
> Should i limit the script to implement N number of records at a time?
> and then sleep or is there a better way?
> - What's the best practice of handling errors and warnings in such a situation?
> - How can i prevent the runtime errors and mysql locks?
wrong question
[--] Data in InnoDB tables: 6G (Tables: 49)
[--] Up for: 5d 11h 17m 15s (493M q [1K qps], 43K conn, TX: 38B, RX: 14B)
[--] Reads / Writes: 89% / 11%
as you can see 30 queries or even 88.000 queries must not
make any trouble if you table-design is OK
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