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Introduce compact WAL record for the common case of commit (non-DDL).

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XLOG_XACT_COMMIT_COMPACT leaves out invalidation messages and relfilenodes,
saving considerable space for the vast majority of transaction commits.
XLOG_XACT_COMMIT keeps same definition as XLOG_PAGE_MAGIC 0xD067 and earlier.

Leonardo Francalanci and Simon Riggs
This commit is contained in:
Simon Riggs
2011-06-28 22:58:17 +01:00
parent 6f3efa76b0
commit 465883b0a2
4 changed files with 195 additions and 84 deletions
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2
src/include/access/xlog_internal.h
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@@ -71,7 +71,7 @@ typedef struct XLogContRecord
/*
* Each page of XLOG file has a header like this:
*/
#define XLOG_PAGE_MAGIC 0xD067 /* can be used as WAL version indicator */
#define XLOG_PAGE_MAGIC 0xD068 /* can be used as WAL version indicator */
typedef struct XLogPageHeaderData
{