On 2/15/17 12:05 PM, Alvaro Herrera wrote:
Jim Nasby wrote:
ISTR previous discussion of allowing more stats files; if that happened
I think having stats that were dedicated to (auto)vacuum would be very
useful. That's clearly a lot more work though.
What?
There's a bunch of information
0.02 sys
decibel@decina:[12:41]~$
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On 2/14/17 12:57 PM, Jim Nasby wrote:
On 2/13/17 12:36 AM, Masahiko Sawada wrote:
It seems sensible to me to do something like this. We already report
a lot of other fine details, so what's one more? And it could be
useful.
Also, I've been proposing to report
if I can find any holes. Are you
only worried about the removal of "useless" rels or is there more?
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I certainly don't think that's mandatory for having
officially blessed "core extensions".
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sed
methodology just gets in my way I'd likely use some other harness to
actually run the tests).
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On 2/14/17 2:05 PM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
First, just to clarify: my reasons for proposing "core adoption" of PGXN
are not technical in nature.
What do you think "core adoption" means? Surely not that anything
associated with
/14/17 8:24 AM, Robert Haas wrote:
On Tue, Feb 14, 2017 at 8:37 AM, Jim Nasby <jim.na...@bluetreble.com> wrote:
Right; I think we need at least some amount of pgxn buildfarm coverage.
There probably also needs to be a way to officially bless certain
distributions. Unless there's a pre
't readily think of another use for flags in
GetOldestXmin, but ISTM it's better to just go with "flags" instead of
"ignoreFlags".
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, and
pg_regress's idea of what a test failure is just gets in my way. But
breaking that out is far more invasive than allowing a template database.
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uot;FWIW" but obviously that wasn't explicit enough.
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Presumably we already know how to parse the contents, so I'd think that
shouldn't be that difficult.
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that checks to see if the psql
completion code has been touched if any of the grammar has been. That
could certainly trigger false positives so it'd need to be easy to
over-ride, but AFAIK that could be done via a special phrase in the
commit message.
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On 2/13/17 9:34 PM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
Is there a reason not to allow $SUBJECT? Specifically, it'd be nice to
be able to do something like WHEN tag LIKE 'ALTER%'.
Seems like it would be a seriously bad idea for such an expression to be
able to
, or whether palloc is so
much faster than malloc that it's not an issue. I suspect that some of
the effects are being masked by other things since presumably palloc and
memcpy are pretty cheap on small volumes of data...
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Experts
alculating sum, I expect to receive more or less precise
result. Certainly I realize that even in case of using double it is
... but now you want to trade performance for accuracy? Why would you
expect the database to magically come to that conclusion?
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buildfarm).
Right; I think we need at least some amount of pgxn buildfarm coverage.
There probably also needs to be a way to officially bless certain
distributions. Unless there's a pretty significant need for an official
extension to be in contrib, it should go into PGXN.
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Is there a reason not to allow $SUBJECT? Specifically, it'd be nice to
be able to do something like WHEN tag LIKE 'ALTER%'.
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ications to relevant threads as well.
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On 2/3/17 7:34 PM, Andres Freund wrote:
On 2017-02-03 19:26:55 -0600, Jim Nasby wrote:
On 2/3/17 6:20 PM, Andres Freund wrote:
- The ringbuffers in shared buffers can be problematic. One possible way of
solving that is to get rid of ringbuffers entirely and rely on different
initial values
an empty array isn't treated the same as NULL, which means
you need some way to create an empty array.
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(PY_MINOR_VERSION << 16) | \
(PY_MICRO_VERSION << 8) | \
(PY_RELEASE_LEVEL << 4) | \
(PY_RELEASE_SERIAL << 0))
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cate.
My vote would be to either kill the views or explicitly deprecate them
and move them to contrib.
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red memory already. If there was a function that reported
checkpoint status pg_basebackup could poll that to provide users with
live status. That should be a separate patch though.
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becomes completely
useless.
I think the ability to filter logging based on context would be very
valuable. AFAIK you could actually do that for manual logging with
existing plpgsql support, but obviously that won't help for anything else.
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run extension/package/module framework has proven to be
extremely valuable for other programming environments, and IMHO we
should be striving to improve in that area.
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Data
, with an N-way associative cache 2x more padding than necessary
cuts the amount you can fit into the cache by half. That could be
meaningful in some cases.
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that next time this happens they save the bad WAL.
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you
to specify an arbitrary expression to test against NEW and OLD.
1: Second, WIP example:
https://github.com/decibel/tg_sanity/blob/master/sql/tg_sanity.sql
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ant ID values, but that's even more involved.
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to change
their tools.
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what people gravitate to, but
I suspect most users would be happier with a construct that worked like
the array trick does, but was easier to accomplish.
I wonder if any other databases have come up with non-standard syntax to
do this.
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be interesting to see how things change if you eliminate the
filler column from the SELECT.
Also, the backend should be buffering ~8kb of data before handing that
to the socket. If that's more than the kernel can buffer I'd expect a
serious performance hit.
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ion of git references in
release notes, but I'd find it useful to be able to at least get a
complete list. Not hard for me to do that since I know git and our
naming scheme, but maybe we should include directions for doing so?
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want to without much extra
effort.
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attached example); I believe that would work regardless of uniqueness.
Just to be clear; the OR by itself is not a problem (as shown by the
first fast query); it's the OR with the JOIN that's a problem.
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ither edit config.cache
and delete the relevant lines or just temporarily move it out of the way
(or just nuke it...).
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triggered backend writes and how
long they took.
Good idea.
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On 2/3/17 6:39 PM, Andres Freund wrote:
Hi,
On 2017-02-03 18:32:03 -0600, Jim Nasby wrote:
Commit 48354581a49c30f5757c203415aa8412d85b0f70 (Allow Pin/UnpinBuffer to
operate in a lockfree manner) removed the code in PinBuffer that
conditionally incremented usage_count when a ring buffer
forks you might have.
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submission.
I just did essentially the same thing for SPI (use a callback to allow
the caller to handle the tuple instead of shoving it into a tuplestore).
A simple test in plpython showed a 460% improvement.
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On 2/2/17 4:39 PM, Corey Huinker wrote:
On Wed, Feb 1, 2017 at 4:58 PM, Jim Nasby <jim.na...@bluetreble.com
<mailto:jim.na...@bluetreble.com>> wrote:
I think the issue here is that the original case for this is a user
accidentally getting into an \if and then having no
Commit 48354581a49c30f5757c203415aa8412d85b0f70 (Allow Pin/UnpinBuffer
to operate in a lockfree manner) removed the code in PinBuffer that
conditionally incremented usage_count when a ring buffer was in use. Was
that intentional? ISTM the old behavior should have been retained.
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than the cluster, yet
there's a non-trivial amount of buffers being written by backends.
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trivial to write an extension that did that though?
foreach r in pg_class where relkind in (...)
for (b = 0; b < r.relpages; b++)
ReadBufferExtended(..., BAS_BULKREAD);
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D
On 2/1/17 4:28 PM, Andres Freund wrote:
On 2016-11-28 11:40:53 -0800, Jim Nasby wrote:
With current limits, the most bgwriter can do (with 8k pages) is 1000 pages
* 100 times/sec = 780MB/s. It's not hard to exceed that with modern
hardware. Should we increase the limit on bgwriter_lru_maxpages
On 2/1/17 4:27 PM, Andres Freund wrote:
On 2017-02-02 09:22:46 +0900, Michael Paquier wrote:
On Thu, Feb 2, 2017 at 9:17 AM, Jim Nasby <jim.na...@bluetreble.com> wrote:
Speaking of which... I have a meeting in 15 minutes to discuss moving to a
server with 4TB of memory. With current
On 2/1/17 3:36 PM, Michael Paquier wrote:
On Thu, Feb 2, 2017 at 7:01 AM, Jim Nasby <jim.na...@bluetreble.com> wrote:
On 2/1/17 10:27 AM, Robert Haas wrote:
This looks fine to me.
This could go without the comments, they are likely going to be
forgotten if any updates happen in the
sure what your intent here is, but if the idea is that a json
array would magically cast to a bool or a number data type I think
that's a bad idea.
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On 2/1/17 10:27 AM, Robert Haas wrote:
On Tue, Jan 31, 2017 at 5:07 PM, Jim Nasby <jim.na...@bluetreble.com> wrote:
On 11/29/16 9:58 AM, Jeff Janes wrote:
Considering a single SSD can do 70% of that limit, I would say
yes.
Next question becomes... should there even be an
to what happens when you miss a quote or a semicolon.
We handle those cases with %R, and I think %R needs to support if as well.
Perhaps there's value to providing more info (active branch, etc), but
ISTM trying to do that will just confuse the original (%R) case.
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On 1/27/17 4:14 AM, Greg Stark wrote:
On 25 January 2017 at 20:06, Jim Nasby <jim.na...@bluetreble.com> wrote:
GUCs support SET LOCAL, but that's not the same as local scoping because the
setting stays in effect unless the substrans aborts. What I'd like is the
ability to set a GUC in a p
to INT_MAX / 2, which is the same
as shared_buffers.
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commit
: they wanted to
grant specific roles the ability to read everything in the database (or
maybe cluster; I don't think the conversation got into that level of
detail).
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Execution time: 48.917 ms
(5 rows)
In any case, +1 for not promoting count(*) <> 0; that's a really, really
bad way to test for existence.
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having a timestamp type
that stores the original timezone.
BTW, time itself fits in the multi-unit pattern, since months don't have
a fixed conversion to days (and technically seconds don't have a fixed
conversion to anything thanks to leap seconds).
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on the issues that have already
been identified before trying to add more features.
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in a plpgsql block *and have the setting
revert on block exit*.
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On 1/25/17 1:46 PM, Jim Nasby wrote:
Based on that and other feedback I'm going to mark this as returned with
feedback, though if you're able to get a revised patch in the next few
days please do.
Actually, based on the message that popped up when I went to do that I
guess it's better
On 1/24/17 11:13 PM, Beena Emerson wrote:
On Wed, Jan 25, 2017 at 10:36 AM, Jim Nasby <jim.na...@bluetreble.com
<mailto:jim.na...@bluetreble.com>> wrote:
On 1/24/17 2:26 AM, Mithun Cy wrote:
Thanks for looking into this patch, I just downloaded the patch and
25.012 IST [91755] LOG: Buffer Dump: saved metadata
of 59 blocks.
Yeah, I wasn't getting that at all, though I did see the shared library
being loaded. If I get a chance I'll try it again.
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terminology other than "buffer dump", because
that makes it sound like we're dumping the contents of the buffers
themselves.
Maybe block_map? Buffer_map?
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not completely grokking your second paragraph, but I would think
that an average user would love got get a heads-up that their hardware
is failing.
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I'll post a plpython patch that doesn't add the output format control.
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On 1/5/17 9:50 PM, Jim Nasby wrote:
The * on that is there's something odd going on where plpython starts
out really fast at this, then gets 100% slower. I've reached out to some
python folks about that. Even so, the overall results from a quick test
on my laptop are (IMHO) impressive
technical standpoint* to enable by default in 10, with only the ability
to dynamically disable. Given the concerns that keep popping up about
dynamically enabling, I'm not at all sure that we could get that into 10.
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On 1/23/17 8:24 PM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
On 1/23/17 7:47 PM, Stephen Frost wrote:
It might be interesting to consider checking them in 'clean' pages in
shared_buffers in a background process, as that, presumably, *would*
detect shared buffers corr
it presumably wouldn't be difficult to do that in an extension,
as a bgworker.
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can we go about collecting data that checksums help? We
certainly know people suffer data corruption. We can only guess at how
many of those incidents would be caught by checksums. I don't see how we
can get data on that unless we get a lot more users running checksums.
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On 1/23/17 6:55 PM, Stephen Frost wrote:
* Jim Nasby (jim.na...@bluetreble.com) wrote:
As others have mentioned, right now practically no one enables this,
so we've got zero data on how useful it might actually be.
Uhm, Peter G just said that Heroku enables this on all their databases
and have
I think it's OK to force users that are enabling
this to manually connect to datallowcon=false and run vacuum.
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855
there's a static variable that gets set to
the relevant OID it's not that bad performance-wise from what I can
tell, but I suspect that's not something we want to be recommending to
others...
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is already well out of the barn by then.
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to try
and significantly increase the rate of buffers being written out.
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the contents of
TZDATA any time it changed, as well as a fast way to find the surrogate
key for the current TZDATA.
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working on.
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To make changes
I took a look at this again, and it doesn't appear to be working for me. The
library is being loaded during startup, but I don't see any further activity in
the log, and I don't see an autoprewarm file in $PGDATA.
There needs to be some kind of documentation change as part of this patch.
I'm
On 1/21/17 6:42 PM, Jim Nasby wrote:
On 12/26/16 2:31 AM, Kyotaro HORIGUCHI wrote:
The points of discussion are the following, I think.
1. The first patch seems working well. It costs the time to scan
the whole of a catcache that have negative entries for other
reloids. However
as an option to exec_*.
finit_ would be better named free_.
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of those concerns. Or perhaps
the original complaint about STATRELATTINH could be solved by just
disabling negative entries on that cache.
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d be great if there was a more automated method.
Such a method might also be very useful for transforming expressions
like date_part('quarter', ...) into something that could use existing
indexes.
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'd be fine.
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To make chang
On 1/22/17 4:41 PM, Jim Nasby wrote:
On 1/21/17 8:54 PM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
The other (possibly naive) question I have is how useful negative
entries really are? Will Postgres regularly incur negative lookups, or
will these only happen due t
On 1/21/17 8:54 PM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
The other (possibly naive) question I have is how useful negative
entries really are? Will Postgres regularly incur negative lookups, or
will these only happen due to user activity?
It varies dep
like the attached.
On another note, does anyone else find the database selection logic
rather difficult to trace through? The logic is kinda spread throughout
several functions. The naming of rebuild_database_list() and
get_database_list() is rather confusing too.
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than
most of the other ideas.
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for the extension to track arbitrary database
objects that were created.
1: https://github.com/decibel/pg_classy/blob/master/doc/pg_classy.asc
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in the towel and said a cast
was impossible.
1: https://github.com/BlueTreble/variant/
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On 1/13/17 4:08 PM, Alvaro Herrera wrote:
Jim Nasby wrote:
On 1/10/17 1:53 AM, Alexander Korotkov wrote:
1. What project ideas we have?
Perhaps allowing SQL-only extensions without requiring filesystem files
would be a good project.
Don't we already have that in patch form? Dimitri
it...
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
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To make changes to your
ark those namespaces (and possibly other objects) as private.
- A way to reference extensions from other extensions and deal with
extensions being moved to a different schema (or namespace).
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architec
it-in-2016-fad96ae22a15?imm_mid=0ec3e0=em-prog-na-na-newsltr_20170114#.shgj609ad
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)
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.
Shouldn't this also apply to
var := blah FROM some_table WHERE ...;
?
AIUI that's one of the beefs the plpgsql2 project has.
FWIW, I'd also be in favor of a NOMULTI option to INTO, but I don't see
any way to do something like that with var := blah FROM.
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Jim Nasby, Data Architect, Blue
On 1/10/17 1:53 AM, Alexander Korotkov wrote:
1. What project ideas we have?
Perhaps allowing SQL-only extensions without requiring filesystem files
would be a good project.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
hole" that you can end up with now. I agree it makes sense
to sen the minimum value correctly.
Not sure if this necessitates changes in pg_upgrade...
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
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rip it out, per the attached.
Verified this works for make check. Looks sane to me.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)
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Sent
.
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)
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To make changes to your
compatibility with
plsql, as well as pulling PSM into core. The former would be to help
migrating from Oracle; the latter would be to provide everyone a cleaner
built-in PL. (IMHO a PLSQL equivalent could certainly be an external
extension).
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Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
there. But that's certainly not the case.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture and PostgreSQL
Data in Trouble? Get it in Treble! http://BlueTreble.com
855-TREBLE2 (855-873-2532)
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