On 11/2/16 6:21 PM, Jim Nasby wrote:
I wouldn't trust the existing cluster that far. Since it sounds like you
have no better options, you could use zero_damaged_pages to allow a
pg_dumpall to complete, but you're going to end up with missing data. So
what I'd suggest would be:
stop Postgres
ou could use zero_damaged_pages to allow a
pg_dumpall to complete, but you're going to end up with missing data. So
what I'd suggest would be:
stop Postgres
make a copy of the cluster
start with zero_damaged_pages
pg_dumpall
stop and remove the cluster (make sure you've got that backup)
create a ne
replication?
Also, it seems the startup
process stucks on “recovering 00010004”, how to resolve
it?
As far as I know that's normal while in streaming mode.
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Data
and push new users away.
And we wonder why we're having trouble attracting new developers...
This has actually been discussed recently on -hackers as well[1], and
there is some general consensus that simplification in this area would
be a good idea.
1:
https://www.postgresql.org/message-id/20
On 10/31/16 3:39 PM, Patrick B wrote:
|(
||extract(epoch FROMnow())-
||extract(epoch FROMpg_last_xact_replay_timestamp())
||)::int lag|
You could certainly simplify it though...
extract(epoch FROM now()-pg_last_xact_replay_timestamp())
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integrity of the data.
AFAIK pg_basebackup blindly copies all data files, while rsync will
transfer only the parts of the files that have actually changed (see
--block-size). If the source and destination are on different servers,
that can mean less data transferred over the network.
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aving a default set largely defeats
the purpose of NOT NULL (IMHO).
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On 9/2/16 8:02 AM, Adrian Klaver wrote:
Best guess is the INDEX on the column is corrupted and needs to be
reindexed:
You should contact AWS support about this; they'd want to know.
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. MySQL
used to tout how fast it was compared to Postgres, using a benchmark it
created specifically for that purpose that had very little to do with
the real world. People eventually discovered that as soon as you had a
concurrent workload Postgres was actually faster.
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es the app is actually running.
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to 1 second).
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, rsync -va --modify-window=1 would remove your concern about a
same second race condition without forcing the sync to read through all
the files.
Very interesting and useful!
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Data
." - Me,
circa 1999.
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'll want to create a separate sqitch migration for
each object.
[1] http://sqitch.org/
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to JSON would make it relatively easy to accomplish what you
want in a plpgsql (or maybe even plsql) function.
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the replication. Depending on your needs, a major benefit to
this method is it makes major version upgrades very simple: you just
stand up a new replica on the new version and then failover to it. If
anything goes wrong, you can fail back to the old version without losing
any data.
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after rsync reads). You need to add the --checksum flag
to rsync (which means it will still have to read everything that's in
/var/lib/pgsql).
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relatively easy to do today; see the has_*_privilege()
functions.
You might also find http://pgxn.org/dist/pg_acl useful.
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855
(and it would be far easier for them to submit improvements).
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of
replication, so you might be better off just sticking with Postgres tools.
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this function? Or some other way? Thanks.
A PL that can accept composite types (such as plpythonu) should be able
to do this.
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occurrence if it's enough to make a difference then you're
already close to the limits of your IO, and if that's true then you
definitely want to spread the checkpoint out over a longer interval.
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mething (like a function) that has explicitly
> defined what the contents of the record are.
We have that already, it's named 'json_each_text'
Apparently you haven't looked at json parse/deparse costs ;P
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On 8/29/16 6:28 AM, Tom Lane wrote:
Pavel Stehule <pavel.steh...@gmail.com> writes:
> 2016-08-29 1:59 GMT+02:00 Jim Nasby <jim.na...@bluetreble.com>:
>> It would be nice if there was a way to pass dynamically formed records
>> around, similar to how you can pass
a breakpoint at
ereport and then trying to connect. You could then get a backtrace; just
don't leave the system in that state for long. (There might be a more
elegant way to do that...)
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is true for SQL functions. But you'd probably need
a more complex query for that to be a win over the lighter weight nature
of SQL functions.
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On 8/16/16 1:05 PM, Adrian Klaver wrote:
On 08/16/2016 07:54 AM, Jim Nasby wrote:
On 8/14/16 5:13 AM, Xtra Coder wrote:
- ability to switch session language from 'sql' to 'pl/pgsql'
Actually, something I wish I had was the ability to temporarily switch
to an entirely different interpreter
...@bluetreble.com)
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almost *any* object in pg_temp!).
What would be a lot more interesting is if creating a temp function
didn't involve writing an entry to the catalog (something being
discussed for temp tables right now).
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ct might be able to do it's expansion
in the original object so that subsequent references to that key
wouldn't need to re-expand it. I don't think the current EO framework
supports that, but it doesn't seem impossible to add...
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On 8/11/16 8:45 AM, Tom Lane wrote:
Jim Nasby <jim.na...@bluetreble.com> writes:
I never dug into why. As Tom posited, decompression might explain the
time to get a single key out. Getting 10 keys instead of just 1 wasn't
10x more expensive, but it was significantly more expensive tha
. That would be
especially useful for debugging plpython functions.
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more expensive, but it was significantly more expensive than just
getting a single key.
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ets
(to improve compression), but I never got around to actually tracing it.
I suspect there's a win to be had by having both json types use the
ExpandedObject stuff.
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least one correctly typed input (even if it's NULL) so
the pseudotype will work.
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9.5+ installs plpython.h under include/server. 9.4 apparently doesn't.
I'm guessing that changed in 9.5? Or am I doing something wrong?
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u're seeing. I suspect that in the process of doing that you're going
to uncover a bug in your code, but if not then we'll have something
concrete we can look at.
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you could
then do a unique index on that WHERE array != array[].
Maybe a less obtuse option would be to use a boolean array. Storage
would be ~8x larger, but since there should be very few rows I doubt
that matters.
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Expe
not exist
...
CONTEXT: SQL function "f" during inlining
In this example, you should be able to avoid that by setting
constraint_exclusion=off.
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(as in, database unit tests). In 9 years in an
environment where downtime was 6 figures per hour I only had 1 or 2
deployments that had problems, and never bad enough to consider reverting.
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ely.
If someone did want that though, it could probably be done as an
extension. I believe you just have to pull all of each relation into
shared buffers for the checksums to be verified.
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code for interval_lt, all that needs to
happen to add this support is to expose interval_cmp_internal() as a
strict function. It already does exactly what you want.
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Is this odd quoting behavior expected? (Note difference between "'a':1"
and "'b':'a'")
~@decina.local/53896# \set df
pd.DataFrame.from_dict([{'a':1,'b':'a'},{'a':2,'b':'b'}])
~@decina.local/53896# \echo :df
pd.DataFrame.from_dict([{a:1,b:'a'},{a:2,b:'b'}])
~@decina.local/5
ed in because they became extremely popular.
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To make ch
On 1/13/16 3:11 PM, Jim Nasby wrote:
On 1/12/16 10:04 PM, Jim Nasby wrote:
Attempting to build a python extension, I'm getting:
Undefined symbols for architecture x86_64:
"_PyErr_Clear", referenced from:
_PLyNdarray_FromDatum in pg_ndarray.o
_PLyObject_
.
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hat.
Obviously you should test all of this thoroughly before doing it in
production.
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On 1/12/16 10:04 PM, Jim Nasby wrote:
Attempting to build a python extension, I'm getting:
Undefined symbols for architecture x86_64:
"_PyErr_Clear", referenced from:
_PLyNdarray_FromDatum in pg_ndarray.o
_PLyObject_To_ndarray in pg_ndarray.o
"_PyImpo
On 1/13/16 2:39 PM, Andreas Joseph Krogh wrote:
Where can I find more info about how to use and configure pg_logical to
replicate a 9.4 DB to 9.5?
http://2ndquadrant.com/en/resources/pglogical/
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ore information.
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To make changes to your sub
erenced from:
_PLyObject_To_ndarray in pg_ndarray.o
ld: symbol(s) not found for architecture x86_64
I've included $(python_includespec) in my Makefile:
override CPPFLAGS := $(python_includespec) $(CPPFLAGS)
Is there some other magic I need? Do I need to switch to using
MODULE_big or something?
-
Anyone looking to get their feet wet in the backend code, please take a
look at
http://www.postgresql.org/message-id/568f03ef.4070...@bluetreble.com.
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be
a lot simpler to just do whatever you need to do when the row is
actually deleted. Just be sure you deal with rollbacks correctly if
you're doing something external.
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Data in Tr
e info. But is this the parse tree for the top level
query which involves the trigger?
Hrm, apparently not. fcinfo->context would maybe be helpful, but I'm not
sure.
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issues with large objects, notably their use of
OIDs. Lots of LOs can lead to OID depletion. There was a thread about
this recently.
It might be about time to come up with an extension that's a replacement
for large objects.
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would be much appreciated.
I don't know off-hand. I suggest you look at what psql does to implement
\copy (note the \).
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I
reporting. Also, not allowing your CoC to become a weapon that
someone can use offensively.
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, ask your questions! The Postgres community really is one of the
most patient and helpful OSS communities out there, and there's plenty
of people that would be happy to explain things. Questions are also a
good way to show where things could possibly be better commented/documented.
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or dealing with an actual situation.
(BTW, if your concern on enforcement is about control, not only can
people be removed from mailing lists and the like, but there actually is
a Postgres legal entity that could start legal proceedings if it ever
came to it.)
[1] http://couchdb.apache.org/conduc
age (which with the planner hooks might
actually be possible).
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RE LEFT(field,5) = ... -- CAN use index
... WHERE LEFT(field,6) = ... -- can NOT use index
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principle there could be, but I've not heard enough
requests to make me think we'd ever pursue it.)
BTW, the case where this would be highly valuable is timestamps. Being
able to do something like date_part('month',timestamptz)='Jan' would be
a big, big deal for warehousing.
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-hand. I suggest you look at what psql does to implement
\copy (note the \).
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On 1/6/16 7:03 PM, Tatsuo Ishii wrote:
Is it possible to get the parse tree in a C trigger function which is
invoked when DML (INSERT/UPDATE/DELETE against a view) is executed?
Yes, it's in fcinfo->flinfo->fn_expr.
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E
re the filter can actually be pushed past the window functions
to get the result you want. That Index Only Scan could still be pulling
every row in the table.
BTW, if you switch the order by to id, shortname then it might be able
to use the index, but of course the results would be different.
On 1/5/16 10:03 PM, John R Pierce wrote:
On 1/5/2016 5:31 PM, Jim Nasby wrote:
IMHO, the real problem here is not simply a CoC, it is that the
Postgres community doesn't focus on developing the community itself.
The closest we come to "focus" is occasional talk on -hackers about
h
thout active
support and some encouragement things aren't going to change.
[1] https://www.facebook.com/jon.erdman.jr/posts/10153828693183899
[2]
http://blog.randi.io/2015/12/31/the-developer-formerly-known-as-freebsdgirl/
[3] https://opensource.com/life/15/8/couchdb-community-apache-way
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On 1/4/16 7:40 PM, Adrian Klaver wrote:
or even better yet could you post the section of the log above the error?
The server log itself might be useful, especially if full query logging
was turned on. Dunno how easy/possible that is with pg_upgrade.
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hook.
Have you looked at https://github.com/2ndQuadrant/pgaudit?
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gmt_date||' '||gmt_time::timestamp
I suspect you need to wrap that in (). Even if the parser does the right
thing there, it'd certainly make the intent a lot clearer.
SELECT (gmt_date || ' ' || gmt_time)::timestamp
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connection
via SPI_connect() and then use the libpq library to issue the copy
commands via PQputCopyData, PQputCopyEnd.
C functions can use SPI, so I'm not sure what the issue is?
http://www.postgresql.org/docs/9.5/static/spi.html
(BTW, you'll want to scroll to the bottom of that page...)
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nce my suggestion. Normally
you'd want to figure out the correct TZ for the lat/long.
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also set a default for than on a specific
database, or a specific user, using ALTER DATABASE SET or ALTER USER SET.)
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hot in cache. If you don't do that, the next query that
reads the tuple will have to set the hints, which also dirties the page.
VACUUM does that too, but there's really no point in having vacuum run
through the entire table just to set hints on less than 1% of it.
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this dynamically either, either by just blindly
dividing longitude by 15 or using actual timezone shape polygons and @>
or <@.
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the same data to
to_tsquery. Your hard-coded example is
where search_vec @@ to_tsquery('213 & E & 13 & ST & N');
but your second query becomes '213 & E & 13 & ST & N:*'. Have you tried
that as a hard-coded value?
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there is an internal C function array_map that can do it. There's no SQL
interface to it, but it shouldn't be hard to add one.
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On 12/29/15 6:50 PM, Tom Lane wrote:
Jim Nasby<jim.na...@bluetreble.com> writes:
>BTW, if you want to simply apply a function to all elements in an array
>there is an internal C function array_map that can do it. There's no SQL
>interface to it, but it shouldn't be
are better off concentrating on proper O/S security and user/table
permissions. That is how to implement database security!
True, but in my experience security audits have nothing to do with
security and everything to do with marking off checkboxes and
complicating lawsuits. ;)
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On 12/24/15 1:56 AM, Pavel Stehule wrote:
I don't know any extension that calculate euclid distance, but it should
be trivial in C - if you don't need to use generic types and generic
operations.
Before messing around with that, I'd recommend trying either pl/r or
pl/pythonu.
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the obvious side
effect of obliterating any data that was in the page.
Uh, only thing is, I don't know if this is done if we're going to be
returning the memory to the OS.
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errors and your
Postgres and filesystem settings for anything dangerous. Index
corruption is not normal and indicates the underlying hardware or OS is
faulty (or maybe a bug in Postgres, but that's very unlikely).
You should also consider turning on page checksums if you haven't already.
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, database processes stored in
memory (memory would be a common resource here).
Of far larger concern at that point is unauthorized access to the
database files.
Basically, if someone gains access to the OS user that Postgres is
running as, or to root, it's game-over.
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you control it too; I know FreeBSD has support for
this. (Whether the drive obeys or not is a different matter...)
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like big vs little endian would be an
obvious example. Postgres would detect all the obvious examples of this
and refuse to start. One thing I'm not sure about is if there were
different locals installed on the two machines.
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Experts
on
"
Since it is not, a high end disk, I expect some errors.
Why? Just because a disk isn't enterprise-grade doesn't mean it has to
lie about fsync, which is the only thing diskchecker.pl tests for.
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...
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. Or configure WAL archiving and let the replica
replay from the archive.
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/.
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.
If you're accepting data from a web form or something you certainly want
it to also check things, so the user gets immediate feedback. But for
anything you need to guarantee, you need to use the database.
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On 12/9/15 7:05 PM, Andreas Kretschmer wrote:
I'm really newbie to PostgreSQL but the boss pushed me to handle it
>and implement it in production f*&%*$%%$#%$#
usually put some limit on fields that a webapp
can write to in the database. That way a bug in the app (or malicious
action) can't just start allocating gigabytes of stuff in your database.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture
4) Pay one of the support companies to develop the feature.
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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
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Sent via pgsql-general mailing list (pgsql-general@postgresql.org)
To ma
rtitions is enough.
This project is a game, btw, described at
You might be interested in https://schemaverse.com/
--
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
--
HERS
RAISE WARNING E'Error %: %\nLast good CTID %', SQLSTATE, SQLERRM, last_good;
bad := true;
END;
END LOOP;
END;
--
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
--
Sent
the test because all connections
it lots.
I've never run pgPool myself, but maybe this means the connection was
broken for some reason. Are there related errors in the Postgres server
log for that node?
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data
able all signal handling
during UDF execution. Just for starters, that means that if a UDF went
into an infinite loop your only way to recover would be to PANIC the
entire database. It would probably create a bunch of other problems as well.
In other words, UDFs *must* be capable of handling an interrupt.
there's any built-in
conversion functions with the correct parameters.
--
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
--
Sent via pgsql-general mailing list (pgsql-general
there, so why not one specialized to Postgres? (And
of course we'd want to be able to cast from that to JSON and back...)
--
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
A to B.
But (assuming A and B are binary compatible) you'd be better off just
breaking the B to C replication, setting B up as a replica of A, and
then setting C up as a replica of B.
--
Jim Nasby, Data Architect, Blue Treble Consulting, Austin TX
Experts in Analytics, Data Architecture
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