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| author | Simon Riggs <simon@2ndQuadrant.com> | 2012-12-02 19:39:37 +0000 |
|---|---|---|
| committer | Simon Riggs <simon@2ndQuadrant.com> | 2012-12-02 19:39:37 +0000 |
| commit | 5c11725867ac3cb06db065f7940143114280649c (patch) | |
| tree | 0c7ab755446364e267930446dc17b2e63739631f /src/backend/access/transam/xlog.c | |
| parent | c11130690d6dca64267201a169cfb38c1adec5ef (diff) | |
| download | postgresql-5c11725867ac3cb06db065f7940143114280649c.tar.gz postgresql-5c11725867ac3cb06db065f7940143114280649c.zip | |
Rearrange storage of data in xl_running_xacts.
Previously we stored all xids mixed together.
Now we store top-level xids first, followed
by all subxids. Also skip logging any subxids
if the snapshot is suboverflowed, since there
are potentially large numbers of them and they
are not useful in that case anyway. Has value
in the envisaged design for decoding of WAL.
No planned effect on Hot Standby.
Andres Freund, reviewed by me
Diffstat (limited to 'src/backend/access/transam/xlog.c')
| -rw-r--r-- | src/backend/access/transam/xlog.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/src/backend/access/transam/xlog.c b/src/backend/access/transam/xlog.c index f78a0882deb..f090baed4f1 100644 --- a/src/backend/access/transam/xlog.c +++ b/src/backend/access/transam/xlog.c @@ -5631,6 +5631,7 @@ StartupXLOG(void) * subxids are listed with their parent prepared transactions. */ running.xcnt = nxids; + running.subxcnt = 0; running.subxid_overflow = false; running.nextXid = checkPoint.nextXid; running.oldestRunningXid = oldestActiveXID; @@ -7834,6 +7835,7 @@ xlog_redo(XLogRecPtr lsn, XLogRecord *record) * with their parent prepared transactions. */ running.xcnt = nxids; + running.subxcnt = 0; running.subxid_overflow = false; running.nextXid = checkPoint.nextXid; running.oldestRunningXid = oldestActiveXID; |