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Don't include unused space in LOG_NEWPAGE records.

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This is the same trick we use when taking a full page image of a buffer
passed to XLogInsert.
This commit is contained in:
Heikki Linnakangas
2013-12-04 00:10:47 +02:00
parent 22122c83f1
commit 9e857436ef
11 changed files with 109 additions and 62 deletions
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6
src/backend/commands/vacuumlazy.c
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@@ -699,14 +699,10 @@ lazy_scan_heap(Relation onerel, LVRelStats *vacrelstats,
* which will cause a PANIC. To prevent that, check whether
* the page has been previously WAL-logged, and if not, do that
* now.
*
* XXX: It would be nice to use a logging method supporting
* standard buffers here since log_newpage_buffer() will write
* the full block instead of omitting the hole.
*/
if (RelationNeedsWAL(onerel) &&
PageGetLSN(page) == InvalidXLogRecPtr)
log_newpage_buffer(buf);
log_newpage_buffer(buf, true);
PageSetAllVisible(page);
visibilitymap_set(onerel, blkno, buf, InvalidXLogRecPtr,