Andres Freund wrote:
On 2015-06-03 15:01:46 -0300, Alvaro Herrera wrote:
One idea I had was: what if the oldestMulti pointed to another multi
earlier in the same 0046 file, so that it is read-as-zeroes (and the
file is created), and then a subsequent multixact truncate tries to read
a
On Wed, Jun 3, 2015 at 8:24 AM, Robert Haas robertmh...@gmail.com wrote:
On Tue, Jun 2, 2015 at 5:22 PM, Andres Freund and...@anarazel.de wrote:
Hm. If GetOldestMultiXactOnDisk() gets the starting point by scanning
the disk it'll always get one at a segment boundary, right? I'm not sure
Robert Haas wrote:
So here's a patch taking a different approach.
I tried to apply this to 9.3 but it's messy because of pgindent. Anyone
would have a problem with me backpatching a pgindent run of multixact.c?
Also, you have a new function SlruPageExists, but we already have
On Mon, Jun 1, 2015 at 4:55 PM, Noah Misch n...@leadboat.com wrote:
While testing this (with inconsistent-multixact-fix-master.patch applied,
FWIW), I noticed a nearby bug with a similar symptom. TruncateMultiXact()
omits the nextMXact==oldestMXact special case found in each other
Thank Bill,
About disks performance, all drives are identical and connected using USB3
connections and yes, I can tweak values and restart Postgres without any
hardship!-)
About seq_page_cost and random_page_cost, I am about to test different lower
values as you and Thomas propose.
Raising the
Hi William, thanks for joining the conversation.
1) We do hope for constraints since a connection to an ERP system is
possible in the future. We want to plan ahead.
2) As for the subclass approach: I would need about 30 subclasses and it
will get really hard to add new products since a change in
On Wed, Jun 3, 2015 at 3:42 PM, Alvaro Herrera alvhe...@2ndquadrant.com wrote:
Thomas Munro wrote:
On Tue, Jun 2, 2015 at 9:30 AM, Alvaro Herrera alvhe...@2ndquadrant.com
wrote:
My guess is that the file existed, and perhaps had one or more pages,
but the wanted page doesn't exist, so we
On Wed, Jun 3, 2015 at 4:48 AM, Thomas Munro
thomas.mu...@enterprisedb.com wrote:
On Wed, Jun 3, 2015 at 3:42 PM, Alvaro Herrera alvhe...@2ndquadrant.com
wrote:
Thomas Munro wrote:
On Tue, Jun 2, 2015 at 9:30 AM, Alvaro Herrera alvhe...@2ndquadrant.com
wrote:
My guess is that the file
On Tue, Jun 2, 2015 at 5:22 PM, Andres Freund and...@anarazel.de wrote:
Hm. If GetOldestMultiXactOnDisk() gets the starting point by scanning
the disk it'll always get one at a segment boundary, right? I'm not sure
that's actually ok; because the value at the beginning of the segment
can
Context.
A query almost filled a SSD drive (temp_tablespace) and my PC got
unresponsive;
I did SELECT pg_cancel_backend(6600); 6600 was the pid of the process and
got a successful answer (t)
However, just after that, the disk simply turned off and the system crashed.
I was able to restart the
On Wed, Jun 3, 2015 at 11:14 AM, Daniel Begin jfd...@hotmail.com wrote:
A query
OK...
But ma question is: What append the temp_tablespace drive get full?
The query, probably...
There is also a temp_tablespaces parameter, which determines the placement
of temporary tables and indexes,
Am 2015-06-03 19:00, schrieb Daniel Begin:
Sorry, my question might not have been clear…
I set myself the temp_tablespace to that location but did not expect
the drive could get full;
Multiple factors may have caused the drive to turn off (not
necessarily postgresql);
So, if that
Sent from my iPad
On Jun 3, 2015, at 7:50 AM, Adrian Stern adrian.st...@unchained.ch wrote:
Hi William, thanks for joining the conversation.
1) We do hope for constraints since a connection to an ERP system is possible
in the future. We want to plan ahead.
2) As for the subclass
Sorry, my question might not have been clear…
I set myself the temp_tablespace to that location but did not expect the drive
could get full;
Multiple factors may have caused the drive to turn off (not necessarily
postgresql);
So, if that temp_tablespace gets full, how postgresql will
On June 3, 2015 02:04:28 PM Roxanne Reid-Bennett wrote:
I think you should evaluate your unease with having to update the database
on release (potentially many times) carefully for what it is and why you
have it. [I'm not saying it is invalid - just know why you have it]
Because no matter
Alvaro Herrera wrote:
Really, the whole question of how this code goes past the open() failure
in SlruPhysicalReadPage baffles me. I don't see any possible way for
the file to be created ...
Hmm, the checkpointer can call TruncateMultiXact when in recovery, on
restartpoints. I wonder if in
On 2015-06-03 15:01:46 -0300, Alvaro Herrera wrote:
Andres Freund wrote:
That's not necessarily the case though, given how the code currently
works. In a bunch of places the SLRUs are accessed *before* having been
made consistent by WAL replay. Especially if several checkpoints/vacuums
Thomas Munro wrote:
I have finally reproduced that error! See attached repro shell script.
The conditions are:
1. next multixact == oldest multixact (no active multixacts, pointing
past the end)
2. next multixact would be the first item on a new page (multixact % 2048 ==
0)
3. the
On 2015-06-03 00:42:55 -0300, Alvaro Herrera wrote:
Thomas Munro wrote:
On Tue, Jun 2, 2015 at 9:30 AM, Alvaro Herrera alvhe...@2ndquadrant.com
wrote:
My guess is that the file existed, and perhaps had one or more pages,
but the wanted page doesn't exist, so we tried to read but got 0
Andres Freund wrote:
On 2015-06-03 00:42:55 -0300, Alvaro Herrera wrote:
Thomas Munro wrote:
On Tue, Jun 2, 2015 at 9:30 AM, Alvaro Herrera alvhe...@2ndquadrant.com
wrote:
My guess is that the file existed, and perhaps had one or more pages,
but the wanted page doesn't exist, so
On 6/3/2015 2:50 AM, Adrian Stern wrote:
Hi William, thanks for joining the conversation.
1) We do hope for constraints since a connection to an ERP system is
possible in the future. We want to plan ahead.
2) As for the subclass approach: I would need about 30 subclasses and
it will get
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