Re: avoid unnecessary failure to open restored WAL files
Simon Riggs <simon@2ndquadrant.com>
From: Simon Riggs <simon@2ndQuadrant.com>
To: Fujii Masao <masao.fujii@gmail.com>
Cc: PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2012-08-07T18:08:54Z
Lists: pgsql-hackers
On 2 August 2012 17:18, Fujii Masao <masao.fujii@gmail.com> wrote: > Hi, > > In HEAD and 9.2, the following scenario happens in archive recovery. > > 1. The archived WAL file is restored onto the temporary file name > "RECOVERYXLOG". > 2. The restored WAL file is renamed to the correct file name like > 000000010000000000000002. > 3. The startup process tries to open the temporary file even though > it's already been renamed > and doesn't exist. This always fails. > 4. The startup process retries to open the correct file as a WAL file > in pg_xlog directory instead > of the archived file. This succeeds. > > The above failure of file open is unnecessary, so I think we can avoid > that. Attached patch > changes the startup process so that it opens the correct restored WAL > file after restoring the > archived WAL file. Looks to me that the strncpy is backwards and will still fail. Please double check. -- Simon Riggs http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Training & Services