On Fri, Aug 31, 2007 at 03:11:29PM -0400, Tom Lane wrote:
Decibel! [EMAIL PROTECTED] writes:
Even if we don't care about folks running on suspect hardware, having a
CRC would make it far more reasonable to recommend full_page_writes=3Doff.
This argument seems ridiculous. Finding out
an array?
SET {'search_path=CURRENT', 'enable_seqscan=false', ...}
Or now that we have arrays of complex types, perhaps an array of type
GUC...
Either case would at least take care of CURRENT...
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could probably make an across-the-board call that all functions
operate as if in their own sub-transaction, at least when it comes to
SET.
Whatever we decide on, least-surprise would dictate that it's the
same whether you apply function-specific settings or not.
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On Sun, Sep 02, 2007 at 11:18:45PM -0300, Marc G. Fournier wrote:
Should be fixed now, running a manual run of it right now, give it about 15
minutes or so ...
Is there now monitoring for it as well?
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a book, if anyone wants to see it.
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search_path, even if
there's something higher in the search_path that would over-ride it.
ISTM that's what most people would expect out of \d.
If no one objects I'll come up with a patch for this.
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that
scan_whole_pool_seconds should take checkpoint intervals into account
somehow.
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On Wed, Sep 05, 2007 at 03:27:50PM -0400, Tom Lane wrote:
Decibel! [EMAIL PROTECTED] writes:
While this is correct on a per-relation level, I'm thinking that it's
not what we'd really like to have happen in psql. What I'd like \d to do
is show me everything in any schema that's in my
but also inserts that re-use space from deleted records.
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this
Is this apoc9009 guy real ?
Pretty much as soon as I saw that comment I just nuked the whole thread
and moved on. I suggest everyone else just do the same.
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.
I realize that ideally we'd probably want FILLFACTOR to take things like
average tuple size and average number of updates per page into account,
but for a first pass 90% would likely be a good compromise...
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. Available by default (thus pgstattuple needs to push into core)
3 isn't that important to me, but 4 is:
4. Doesn't hammer the database to measure
And pgstattuple fails #4 miserably. Want to know the average dead space
in a 500GB database? Yeah, right
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to take all that long...
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On Sep 19, 2007, at 8:08 AM, Tom Lane wrote:
Decibel! [EMAIL PROTECTED] writes:
3 isn't that important to me, but 4 is:
4. Doesn't hammer the database to measure
And pgstattuple fails #4 miserably. Want to know the average dead
space
in a 500GB database? Yeah, right
So we could put
On Sep 19, 2007, at 2:08 AM, Guillaume Smet wrote:
On 9/19/07, Decibel! [EMAIL PROTECTED] wrote:
Odd... I'd expect it to actually be beneficial to run analyze on a
table
at roughly the same time as PK building, because you'd make better
use
of cache.
Sure if your database fits entirely
).
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On Tue, Oct 02, 2007 at 09:07:54PM -0400, Alvaro Herrera wrote:
Decibel! wrote:
Hrm... what about adding output to vacuum verbose that indicates how many
pages in a relation have free space? That would allow something like
pgfouine to see how many FSM pages were needed. It would also
.
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it should get killed off.
I believe it's useful when dealing with very bloated relations. If
someone's looking for an itch to scratch, ways to more effectively
shrink bloated relations would be good.
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threshold, we just run with
that plan. If not, we go back and do a more detailed estimate.
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guesses have a low confidence.
Something pulled right out of most_common_vals has a high confidence.
Something estimated via a bucket is in-between, and perhaps adjusted
by the number of tuples.
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*...
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, the real-world case we have are updatable views on top of a
union. In this case we'd want the result to reflect the updates that
occurred in all the tables, not just in the last table in the rule.
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into an
actual object name, and (ref)objsubid into a real name.
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To make changes
of that should be providing a means to determine what the
underlying type of an any is. Having that would allow functions to
take actions appropriate to different types.
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of anyelement(N) might be a lot more
practical...
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On Sep 12, 2009, at 5:54 PM, Andrew Dunstan wrote:
decibel wrote:
Speaking of concatenation...
Something I find sorely missing in plpgsql is the ability to put
variables inside of a string, ie:
DECLARE
v_table text := ...
v_sql text;
BEGIN
v_sql := SELECT * FROM $v_table;
Of course, I'm
On Sep 14, 2009, at 12:13 AM, Pavel Stehule wrote:
2009/9/13 decibel deci...@decibel.org:
On Sep 12, 2009, at 5:54 PM, Andrew Dunstan wrote:
decibel wrote:
Speaking of concatenation...
Something I find sorely missing in plpgsql is the ability to put
variables inside of a string, ie
and case it after the fact). I'm not sure if a function is the
best way to do this or if a table or view would be better (something
you could join to). One benefit of a table or view is that you could
provide both cased and lower versions of the names.
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, but only
because everything is referencing the same field.
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To make changes to your
that's needed to trim the
file on disk.
That said, *any* step that improves dealing with table bloat is
extremely welcome, as right now you're basically stuck rebuilding the
table.
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to desirable tab-completion behavior. OTOH, we have
survived with pg_index vs pg_indexes, so maybe it wouldn't
kill us.
Another option is to revisit the set of system views (http://
pgfoundry.org/projects/newsysviews/). IIRC there was some other
recent reason we wanted to do that.
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On Sep 30, 2009, at 5:13 PM, Kevin Grittner wrote:
decibel deci...@decibel.org wrote:
*any* step that improves dealing with table bloat is extremely
welcome, as right now you're basically stuck rebuilding the table.
+1
Although, possibly more irritating than actually rebuilding
.
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intentionally want the same hint to
apply to a bunch of queries, and extremely likely that you could
accidentally forget to re-enable something.
That said, thanks for contributing this!
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I think you misunderstand what ALTER SEQUENCE RESTART does; it only
changes the current value of the sequence.
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be nice, but I'd settle
for just dumping it to a file somewhere. Or maybe into the logs.
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On Mar 25, 2008, at 11:33 AM, Sam Mason wrote:
On Mon, Mar 24, 2008 at 05:27:04PM -0500, Decibel! wrote:
On Mar 20, 2008, at 2:23 PM, Sam Mason wrote:
SELECT i, (MIN((j,k))).k
FROM tbl
GROUP BY i;
How is that any better than SELECT i, min(k) FROM tbl GROUP BY i ?
Because I want
CVS access,
takes a snapshot of the tree (preferably via a filesystem snapshot),
and then unlocks. That snapshot would then be used to drive the
mirrors. That would ensure that mirrors always had an atomic view of
things.
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should be
created? Needing to be able to create multiple indexes at once
efficiently was an implementation detail to pull that off.
Someone at EnterpriseDB (Pavan?) did work on that. I don't know what
the status of that effort is.
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benchmarks against other versions if that
would be useful.
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On Apr 3, 2008, at 12:52 AM, Zoltan Boszormenyi wrote:
Where is the info in the sequence to provide restarting with
the _original_ start value?
There isn't any. If you want the sequence to start at some magic
value, adjust the minimum value.
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pretty certain that
Oracle supports this. IIRC you actually create what appears to the
database to be a real table, except for restrictions on what you can
actually do with it (for example, IIRC it's read-only).
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Give your
if there was a command
(\G ?) that would accept additional options for controlling output.
It should be possible to map the options to existing psql output
stuff, so that you could force any single command to output in any
format that you wanted it to.
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once it finds a problem it would just throw all the input data
away, but when used in the context of a dump file this would remove
all the bogus errors that either psql or the backend will generate
when trying to process table data as if it was commands.
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a stand-alone job that you're not connected
to. You could even think of it as every command you run being a job,
it's just a question of if you're actually connected to it or not.
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of the copy failed... I'm not
sure on a good way to handle that, perhaps other than switching to
\COPY.
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queries. In particular, it would be handy if I had an
alias that was SELECT now()-query_start,* FROM pg_stat_activity WHERE
current_query != 'IDLE' ORDER BY 1 and force that to be brought
into less (which I could probably do via \g | less).
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at it.
What I think we need is a tracker that has a web interface to email,
along with archiving. That way the discussion can take place via email.
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to be more than a big IF-THEN-ELSE
then I think that's part of what we should do.
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).
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clustering certainly offers a benefit. Is there some way we can
improve the patch to reduce the impact to INSERT?
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that should just be removed.
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what it would do to the planner; the entire key there would be
identifying field groupings that covered sets of fields in the WHERE
clause.
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On Apr 17, 2008, at 12:22 PM, Gregory Stark wrote:
Decibel! [EMAIL PROTECTED] writes:
For each field that isn't already in a set of field groupings
* Sort sample rows on that field
* Calculate correlation for all other fields
* If there are other fields that have a correlation to this sort
this for pgstats at some point.
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also need stats for how
often we find pages for a relation in the OS cache, which no one has
come up with a good method for.
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very small block sizes are fairly
exceptional,
unless you have a reason up your sleeve why they are a good idea.
What if we used the OFFSET 0 trick to force the ordering to occur
outside of what we're testing? IE:
SELECT * FROM (query we're testing OFFSET 0) ORDER BY blah;
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showing both delete and more than 2 WHEN cases. Something like the
multiple actions on single target row test case would work.
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On Apr 22, 2008, at 3:20 PM, Martijn van Oosterhout wrote:
On Tue, Apr 22, 2008 at 02:19:24PM -0500, Decibel! wrote:
But no matter how this is done, I think we need to handle the race
conditions, and handle them by default. If people *really* know what
they're doing, they can disable the row
reflect recent reality,
what's in the buffer cache and what the stats say have been
historical cached can diverge.
Yeah, I kinda hand-waved over that. Obviously we'd want to look at
recent stats, not beginning of time.
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Give
indexes, possibly overlapping/contained
subset of the GIT use case.
Also useful, though I generally try and put the most diverse values
first in indexes to increase the odds of them being used. Perhaps if
we had compression this would change.
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/projects/newsysviews/
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, but that doesn't mean a fast MERGE wouldn't be
useful. It certainly would have saved me some effort, and it would
probably out-perform the current code.
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[INCLUDING FOREIGN KEYS]
which would do what it looks like it does.
It's surprising to me that INCLUDING CONSTRAINTS doesn't include FK
constraints... is there a reason not to? Perhaps we should just
change INCLUDING CONSTRAINTS to do that...
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of % substitution. It's
incredibly useful; I have it in probably 80% of my RAISE statements.
It encourages providing more detailed error messages, which is a Good
Thing.
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this, but I reeally think users are going to
complain if we remove the % replacement stuff... Is there no way to
keep that with the new syntax?
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instead of from the main table, then we
don't need this feature at the moment. Otherwise: Could anyone
Has anyone contacted the OP about implementing this? Do we have
procedure in place for people to sponsor major features like this?
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but this is the
part that made the difference) after a little change the query took
~1 second:
select * from t1, t2 where t1.id 158507 and t2.id 158507 and
t1.id = t2.id;
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Is there a reason that we can't add a trigger to a table while a
select is running? This is a serious pain when trying to setup
londiste or slony.
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.
Related to that, I really wish that our statement-level triggers
provided NEW and OLD recordsets like some other databases do. That
would allow for RI triggers to be done on a per-statement basis, and
they could aggregate keys to be checked.
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On May 27, 2008, at 2:35 PM, Simon Riggs wrote:
After some discussions at PGCon, I'd like to make some proposals for
hint bit setting with the aim to reduce write overhead.
For those that missed it... http://wiki.postgresql.org/wiki/Hint_Bits
(see archive reference at bottom).
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On May 30, 2008, at 9:51 AM, Simon Riggs wrote:
On Thu, 2008-05-29 at 19:18 -0500, Decibel! wrote:
Is there a reason that we can't add a trigger to a table while a
select is running? This is a serious pain when trying to setup
londiste or slony.
This is constrained by locking
of http://pgfoundry.org/projects/qbe/ ... or
do I misunderstand?
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between data in the database and in memcached.
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could probably find it in archives.
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On Jun 2, 2008, at 11:46 AM, Tom Lane wrote:
* Should the fill value be the first parameter instead of the last?
+1. The other way just seems weird, at least to me.
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provide a way to turn
that binary file into text (and back). That would allow for a lot of
options when it comes to configuring stuff.
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pgpevhyANSHLm.pgp
can figure out what (if anything) we're doing with the
existing .conf, and what a new one (if it exists) might look like.
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in situations where I had to try and track down
what options had been used originally.
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On Jun 3, 2008, at 5:04 PM, Simon Riggs wrote:
On Tue, 2008-06-03 at 16:48 -0500, Decibel! wrote:
On May 30, 2008, at 9:51 AM, Simon Riggs wrote:
On Thu, 2008-05-29 at 19:18 -0500, Decibel! wrote:
Is there a reason that we can't add a trigger to a table while a
select is running
this in perspective, the amount of revenue we would loose from
adding just one FK to one of our larger tables would more than cover
paying someone to develop this feature.
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, please, windowing functions would be great to have even if not
fully implemented.
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in the dev meeting about how the community
wants to handle people wanting to sponsor a project? Do they donate
to SPI? Do we have an escrow fund? Do we just point them at one of
the Postgres Companies and hope they're willing to pay for the
whole thing?
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these
problems are insurmountable.
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everything whenever any
setting is changed (this assumes that we store postgresql.conf
internally in some fashion, so that we're not actually hitting the
file all the time and possibly picking up random edits).
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Give your
with max_connections of 1000 that's only 32M,
which is trivial for any box that's actually configured for 1000
connections.
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handled by postgres at index level ? Is any sort
of hashing done ?
This is better asked on pgsql-general... but the subplan does exactly
what it says; an index scan. It will be executed for every row of the
calling query.
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Give
in we might as well allow it to be set to 0 which
disables logging.
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On Jun 20, 2008, at 11:48 AM, Tom Lane wrote:
Decibel! [EMAIL PROTECTED] writes:
I realize we just got rid of stats_command_string, but if we're
adding a GUC back in we might as well allow it to be set to 0 which
disables logging.
How would that not duplicate track_activities?
Sorry, I
... :)
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on a crash. Along the same
lines, perhaps we can just keep updates in shared memory instead of
in a file, since that's proven to cause issues for some people.
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). That check didn't show as many questionable index
pointers, but there were some (again, the bulk of them were index
pointers that were using the first line pointer slot in the index page).
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to understand what the
first item in the index is.
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Decibel!, aka Jim C. Nasby, Database Architect [EMAIL PROTECTED]
Give your computer some brain candy! www.distributed.net Team #1828
smime.p7s
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be
avoided when possible.
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Decibel!, aka Jim C. Nasby, Database Architect [EMAIL PROTECTED]
Give your computer some brain candy! www.distributed.net Team #1828
smime.p7s
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this was visible from the /tmp
location. Also I would like to know if theer is any other
alternative with which i can restart the service and retain the
postmaster.pid file.
My guess would be that something went in and removed the .pid file.
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Decibel!, aka Jim C. Nasby, Database Architect [EMAIL
to be a bit careful about when you add
very large tables due to the copy overhead, but other than that I
haven't had issues.
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Decibel!, aka Jim C. Nasby, Database Architect [EMAIL PROTECTED]
Give your computer some brain candy! www.distributed.net Team #1828
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as some kind of common transport can be
agreed upon (such as text). So having a change capture and apply
mechanism that isn't dependent on a lot of extra stuff would be
generally useful to any replication mechanism.
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Decibel!, aka Jim C. Nasby, Database Architect [EMAIL PROTECTED]
Give your
On Jul 22, 2008, at 4:43 PM, Markus Wanner wrote:
Decibel! wrote:
ISTM that both londiste and Slony would be able to make use of
these improvements as well. A modular replication system should be
able to use a variety of methods for logging data changes and then
applying them
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