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Re: Rev 3915: MDEV-5388 - Reduce usage of LOCK_open: unused_tables

 

Hi, Sergey!

On Dec 12, Sergey Vojtovich wrote:
> > > > Okay, so you only purge one table at time? Since purge is kind
> > > > of an expensive operation, it's better to amortize the cost of
> > > > it by purging many tables at once.
> > > With current algorithm it is impossible to get multiple tables for
> > > purge here, explanation above.
> > But you said that in the next patch it becomes possible, or did I
> > misunderstand?
> Yes, it becomes possible, but I'd say it is headache of the next patch.

I mean something simpler, actually. Like, when a limit is reached, purge
10 (or 20, or 100, or 10%) tables at once.

Regards,
Sergei



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