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Change the timestamps recorded in transaction commit/abort xlog records

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from time_t to TimestampTz representation.  This provides full gettimeofday()
resolution of the timestamps, which might be useful when attempting to
do point-in-time recovery --- previously it was not possible to specify
the stop point with sub-second resolution.  But mostly this is to get
rid of TimestampTz-to-time_t conversion overhead during commit.  Per my
proposal of a day or two back.
This commit is contained in:
Tom Lane
2007-04-30 21:01:53 +00:00
parent 641912b4d1
commit c432061963
7 changed files with 67 additions and 42 deletions
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6
src/include/access/xact.h
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@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/access/xact.h,v 1.86 2007/04/30 03:23:49 tgl Exp $
* $PostgreSQL: pgsql/src/include/access/xact.h,v 1.87 2007/04/30 21:01:53 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -81,7 +81,7 @@ typedef void (*SubXactCallback) (SubXactEvent event, SubTransactionId mySubid,
typedef struct xl_xact_commit
{
time_t xtime;
TimestampTz xact_time; /* time of commit */
int nrels; /* number of RelFileNodes */
int nsubxacts; /* number of subtransaction XIDs */
/* Array of RelFileNode(s) to drop at commit */
@ -93,7 +93,7 @@ typedef struct xl_xact_commit
typedef struct xl_xact_abort
{
time_t xtime;
TimestampTz xact_time; /* time of abort */
int nrels; /* number of RelFileNodes */
int nsubxacts; /* number of subtransaction XIDs */
/* Array of RelFileNode(s) to drop at abort */