database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-30 21:42:05 +03:00
Code Activity

Remove old-style VACUUM FULL (which was known for a little while as

Browse Source 
VACUUM FULL INPLACE), along with a boatload of subsidiary code and complexity.
Per discussion, the use case for this method of vacuuming is no longer large
enough to justify maintaining it; not to mention that we don't wish to invest
the work that would be needed to make it play nicely with Hot Standby.

Aside from the code directly related to old-style VACUUM FULL, this commit
removes support for certain WAL record types that could only be generated
within VACUUM FULL, redirect-pointer removal in heap_page_prune, and
nontransactional generation of cache invalidation sinval messages (the last
being the sticking point for Hot Standby).

We still have to retain all code that copes with finding HEAP_MOVED_OFF and
HEAP_MOVED_IN flag bits on existing tuples.  This can't be removed as long
as we want to support in-place update from pre-9.0 databases.
This commit is contained in:
Tom Lane
2010-02-08 04:33:55 +00:00
parent 1ddc2703a9
commit 0a469c8769
41 changed files with 247 additions and 3737 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
src/backend/access/transam/xlog.c
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.367 2010/02/07 20:48:09 tgl Exp $
* $PostgreSQL: pgsql/src/backend/access/transam/xlog.c,v 1.368 2010/02/08 04:33:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -2106,32 +2106,6 @@ XLogBackgroundFlush(void)
END_CRIT_SECTION();
}
/*
* Flush any previous asynchronously-committed transactions' commit records.
*
* NOTE: it is unwise to assume that this provides any strong guarantees.
* In particular, because of the inexact LSN bookkeeping used by clog.c,
* we cannot assume that hint bits will be settable for these transactions.
*/
void
XLogAsyncCommitFlush(void)
{
XLogRecPtr WriteRqstPtr;
/* use volatile pointer to prevent code rearrangement */
volatile XLogCtlData *xlogctl = XLogCtl;
/* There's no asynchronously committed transactions during recovery */
if (RecoveryInProgress())
return;
SpinLockAcquire(&xlogctl->info_lck);
WriteRqstPtr = xlogctl->asyncCommitLSN;
SpinLockRelease(&xlogctl->info_lck);
XLogFlush(WriteRqstPtr);
}
/*
* Test whether XLOG data has been flushed up to (at least) the given position.
*