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Andres Freund 6c2003f8a1 Don't force-assign transaction id when exporting a snapshot. ... Previously we required every exported transaction to have an xid assigned. That was used to check that the exporting transaction is still running, which in turn is needed to guarantee that that necessary rows haven't been removed in between exporting and importing the snapshot. The exported xid caused unnecessary problems with logical decoding, because slot creation has to wait for all concurrent xid to finish, which in turn serializes concurrent slot creation. It also prohibited snapshots to be exported on hot-standby replicas. Instead export the virtual transactionid, which avoids the unnecessary serialization and the inability to export snapshots on standbys. This changes the file name of the exported snapshot, but since we never documented what that one means, that seems ok. Author: Petr Jelinek, slightly editorialized by me Reviewed-By: Andres Freund Discussion: https://postgr.es/m/f598b4b8-8cd7-0d54-0939-adda763d8c34@2ndquadrant.com		9 years ago
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buffer	Revert unintentional change in increasing usage count during pin of buffers,	9 years ago
file	Post-PG 10 beta1 pgindent run	9 years ago
freespace	Update copyright via script for 2017	9 years ago
ipc	Don't force-assign transaction id when exporting a snapshot.	9 years ago
large_object	Fix CatalogTupleInsert/Update abstraction for case of shared indstate.	9 years ago
lmgr	Don't force-assign transaction id when exporting a snapshot.	9 years ago
page	Re-run pgindent.	9 years ago
smgr	Post-PG 10 beta1 pgindent run	9 years ago
Makefile	Remove cvs keywords from all files.	15 years ago