Fujii Masao wrote:
On Fri, Apr 24, 2009 at 3:20 PM, Heikki Linnakangas
<heikki.linnakan...@enterprisedb.com> wrote:
It's not safe to write WAL after the checkpoint, as RequestXLogSwitch()
does. After restart, the system will start inserting WAL from the checkpoint
redo point, which is just before the XLOG_SWITCH record, and will overwrite
it.
Since, in this case, the WAL file including XLOG_SWITCH exists
in archive, I don't think that it's unsafe, i.e. XLOG_SWITCH would
be treated as the last applied record and not be overwritten. WAL
records would start to be inserted from the subsequent file (with
new timeline).
It will be overwritten in a normal non-archive-recovery startup.
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
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