Quick progress report:
On Thu, 2007-06-21 at 16:05 -0400, Tom Lane wrote:
Simon Riggs [EMAIL PROTECTED] writes:
Completed all of the agreed changes for TG:
All comments changed, plus some refactoring of code.
Can we fix it to be a read test instead of a write test, that is, if
we know WAL
On Thu, 2007-06-21 at 16:05 -0400, Tom Lane wrote:
Simon Riggs [EMAIL PROTECTED] writes:
Completed all of the agreed changes for TG:
I've just realized that there's a fatal problem with this design.
We've now got tqual.c setting page LSN when it holds only share lock
on the buffer. That
On Fri, 2007-06-22 at 10:22 -0400, Tom Lane wrote:
4. If WAL has not been flushed far enough to be certain that the target
transaction's commit is synced, then defer setting the hint bit. This
does not require any new per-transaction state, we can just measure it
on the basis of the lsn
Simon Riggs [EMAIL PROTECTED] writes:
Completed all of the agreed changes for TG:
I've just realized that there's a fatal problem with this design.
We've now got tqual.c setting page LSN when it holds only share lock
on the buffer. That will absolutely not work, eg two backends might
Completed all of the agreed changes for TG:
- WAL writer now runs always, wal_writer_delay = 50ms (default)
- when transaction_guarantee = off we record the latest LSN
- when we set xact hint bits we look at the latest LSN
- added database-level stats to show guaranteed commits
- fsync parameter
