On Thu, Mar 22, 2012 at 5:26 PM, Daniel Farina wrote:
> Some time ago I reported bug 6291[0], which reported a Xid wraparound,
> both as reported in pg_controldata and by txid_current_snapshot.
> Unfortunately, nobody could reproduce it.
>
> Today, the same system of ours just passed the wraparoun
2012/3/29 Marko Kreen
> I can't find a place where WAL replay updates values under XLogCtl.
> If that really does not happen, that would explain why standbys can
> see wrong epoch.
>
> No clue yet how master can get broken.
>
>
Details about environment:
Debian
Linux db 2.6.32-5-amd64 #1 SMP Fr
On Thu, Mar 29, 2012 at 03:23:01PM +0100, Simon Riggs wrote:
> On Thu, Mar 29, 2012 at 3:04 PM, Marko Kreen wrote:
> > Next question: how can flipping archive_mode on and off,
> > with restarts, near wraparound point, break epoch on master?
> >
> > http://lists.pgfoundry.org/pipermail/skytools-us
On Thu, Mar 29, 2012 at 3:04 PM, Marko Kreen wrote:
> On Thu, Mar 29, 2012 at 02:46:23PM +0100, Simon Riggs wrote:
>> On Thu, Mar 29, 2012 at 12:06 PM, Simon Riggs wrote:
>> > Patch coming in a few hours.
>>
>> This is more straightforward than I was thinking. We just need to
>> initialise XLogCt
On Thu, Mar 29, 2012 at 02:46:23PM +0100, Simon Riggs wrote:
> On Thu, Mar 29, 2012 at 12:06 PM, Simon Riggs wrote:
> > Patch coming in a few hours.
>
> This is more straightforward than I was thinking. We just need to
> initialise XLogCtl at the right place.
Looks good to me. That should fix t
On Thu, Mar 29, 2012 at 12:06 PM, Simon Riggs wrote:
> Patch coming in a few hours.
This is more straightforward than I was thinking. We just need to
initialise XLogCtl at the right place.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Tra
On Thu, Mar 29, 2012 at 11:12 AM, Marko Kreen wrote:
> On Thu, Mar 29, 2012 at 10:37:54AM +0100, Simon Riggs wrote:
>> When the standby receives the checkpoint record, it stores the
>> information in 2 places:
>> i) directly into ControlFile->checkPointCopy
>> ii) and then into XLogCtl when a safe
On Thu, Mar 29, 2012 at 10:37:54AM +0100, Simon Riggs wrote:
> When the standby receives the checkpoint record, it stores the
> information in 2 places:
> i) directly into ControlFile->checkPointCopy
> ii) and then into XLogCtl when a safe restartpoint occurs
In RecoveryRestartPoint() I see:
- me
On Wed, Mar 28, 2012 at 10:54 PM, Simon Riggs wrote:
> On Wed, Mar 28, 2012 at 10:24 PM, Simon Riggs wrote:
>> On Wed, Mar 28, 2012 at 9:48 PM, Marko Kreen wrote:
>>> On Fri, Mar 23, 2012 at 08:52:40AM +, Simon Riggs wrote:
Master pg_controldata - OK txid_current_snapshot() - OK
St
On Wed, Mar 28, 2012 at 10:54:58PM +0100, Simon Riggs wrote:
> On Wed, Mar 28, 2012 at 10:24 PM, Simon Riggs wrote:
> > On Wed, Mar 28, 2012 at 9:48 PM, Marko Kreen wrote:
> >> On Fri, Mar 23, 2012 at 08:52:40AM +, Simon Riggs wrote:
> >>> Master pg_controldata - OK txid_current_snapshot() -
On Wed, Mar 28, 2012 at 10:24 PM, Simon Riggs wrote:
> On Wed, Mar 28, 2012 at 9:48 PM, Marko Kreen wrote:
>> On Fri, Mar 23, 2012 at 08:52:40AM +, Simon Riggs wrote:
>>> Master pg_controldata - OK txid_current_snapshot() - OK
>>> Standby pg_controldata - OK txid_current_snapshot() - lower va
On Wed, Mar 28, 2012 at 9:48 PM, Marko Kreen wrote:
> On Fri, Mar 23, 2012 at 08:52:40AM +, Simon Riggs wrote:
>> Master pg_controldata - OK txid_current_snapshot() - OK
>> Standby pg_controldata - OK txid_current_snapshot() - lower value
>
> On Skytools list is report about master with slaves
On Fri, Mar 23, 2012 at 08:52:40AM +, Simon Riggs wrote:
> Master pg_controldata - OK txid_current_snapshot() - OK
> Standby pg_controldata - OK txid_current_snapshot() - lower value
On Skytools list is report about master with slaves, but the
lower value appears on master too:
http://lists
On Fri, Mar 23, 2012 at 1:52 AM, Simon Riggs wrote:
> So we have this?
>
> Master pg_controldata - OK txid_current_snapshot() - OK
> Standby pg_controldata - OK txid_current_snapshot() - lower value
>
> Are there just 2 standbys? So all standbys have acted identically?
Yes, I believe this is the
On Fri, Mar 23, 2012 at 12:26 AM, Daniel Farina wrote:
> Some time ago I reported bug 6291[0], which reported a Xid wraparound,
> both as reported in pg_controldata and by txid_current_snapshot.
> Unfortunately, nobody could reproduce it.
>
> Today, the same system of ours just passed the wraparo
Some time ago I reported bug 6291[0], which reported a Xid wraparound,
both as reported in pg_controldata and by txid_current_snapshot.
Unfortunately, nobody could reproduce it.
Today, the same system of ours just passed the wraparound mark
successfully at this time, incrementing the epoch. Howev
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