Simon Riggs wrote:
On Wed, 2008-10-22 at 17:18 +0300, Heikki Linnakangas wrote:
It doesn't need to be in subtrans before it appears on
disk, AFAICS.
I don't make these rules. Read comments in AssignTransactionId().
You mean this one:
/*
* Generate a new Xid and record it in PG_PROC and pg_subtrans.
*
* NB: we must make the subtrans entry BEFORE the Xid appears anywhere
in
* shared storage other than PG_PROC; because if there's no room for it
in
* PG_PROC, the subtrans entry is needed to ensure that other backends
see
* the Xid as "running". See GetNewTransactionId.
*/
? The way I read that is that as long as there's an entry in
UnobservedXids, we don't need a subtrans entry.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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