Re: Streaming Replication docs

Fujii Masao wrote:
> We might need to add the following code of pg_standby into the core,
> to prefer it for many cases.
> 
>> #ifdef WIN32
>>
>> 			/*
>> 			 * Windows 'cp' sets the final file size before the copy is
>> 			 * complete, and not yet ready to be opened by pg_standby. So we
>> 			 * wait for sleeptime secs before attempting to restore. If that
>> 			 * is not enough, we will rely on the retry/holdoff mechanism.
>> 			 * GNUWin32's cp does not have this problem.
>> 			 */
>> 			pg_usleep(sleeptime * 1000000L);
>> #endif

That's actually a bit questionable, always has been even in pg_standby.
It adds a constant 1 s delay to the recovery each WAL file, which
effectively rate-limits the WAL recovery to 16MB per second. I think we
should rather add a warning to the docs, suggesting the copy-then-rename
method on Windows.

-- 
  Heikki Linnakangas
  EnterpriseDB   http://www.enterprisedb.com