RE: Way to much log switching!!!

  • From: Jeremiah Wilton <jwilton@xxxxxxxxxxxxx>
  • To: oracle-l@xxxxxxxxxxxxx
  • Date: Wed, 30 Jun 2004 14:14:05 -0700 (PDT)

On Wed, 30 Jun 2004 Rajesh.Rao@xxxxxxxxxxxx wrote:

> I dont think recovery is the issue. The issue could be performance, caused,
> if not by frequent checkpointing, then by log switches. Does redo logging
> not freeze during a log switch, since log buffer space wont be allocated
> until the log switch is complete. So, in an hour, is it not better to have
> 3 log switches than 30?

Well this is not normally a significant factor in most environments.

But if someone thinks that people are spending time waiting on log
switches, they can always look at v$system_event and find out if 'log
file switch' comprises any significant proportion of waits.

Otherwise, it is just conjecture, right?

Jeremiah Wilton
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