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Force zero_damaged_pages to be effectively ON during recovery from WAL,

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since there is no need to worry about damaged pages when we are going to
overwrite them anyway from the WAL.  Per recent discussion.
This commit is contained in:
Tom Lane 2003-12-01 16:53:19 +00:00
parent 64e5a85625
commit 0902ece5b9
1 changed files with 8 additions and 2 deletions
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10
src/backend/storage/buffer/bufmgr.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.147 2003/11/29 19:51:56 pgsql Exp $
* $PostgreSQL: pgsql/src/backend/storage/buffer/bufmgr.c,v 1.148 2003/12/01 16:53:19 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -231,7 +231,13 @@ ReadBufferInternal(Relation reln, BlockNumber blockNum,
if (status == SM_SUCCESS &&
!PageHeaderIsValid((PageHeader) MAKE_PTR(bufHdr->data)))
{
if (zero_damaged_pages)
/*
* During WAL recovery, the first access to any data page should
* overwrite the whole page from the WAL; so a clobbered page
* header is not reason to fail. Hence, when InRecovery we may
* always act as though zero_damaged_pages is ON.
*/
if (zero_damaged_pages || InRecovery)
{
ereport(WARNING,
(errcode(ERRCODE_DATA_CORRUPTED),