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Postgresql Error Out Of Memory For Query Result

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Are there any historically significant examples? The most recent time it crashed, the first three lines logged were: 2015-04-07 05:32:39 UTC ERROR: out of memory 2015-04-07 05:32:39 UTC DETAIL: Failed on request of size 125. 2015-04-07 05:32:39 Then I see the psql process eat up memory till it hits the 2G mark (imposed by the loader.conf tuner) and then "out of memory". Interviewee offered code samples from current employer -- should I accept? have a peek here

Story about crystal flowers that stop time? I would have expected to find an error there. -- Until later, Geoffrey "I predict future happiness for America if they can prevent the government from wasting the labors of the Are illegal immigrants more likely to commit crimes? In this example I increased work_mem modestly from 4MB to 8MB – why not increase it to 1GB or 10GB? http://dba.stackexchange.com/questions/64570/postgresql-error-out-of-memory

Postgresql Out Of Memory Failed On Request Of Size

This special hash table is an optimization to handle hash values that occur frequently in the data. But in fact, Postgres limits the size of each hash table to only 4MB! Removing the order by clause doesn't help, nor does reducing work_mem to 8MB. Should I boost his character level to match the rest of the group?

Date: 2013-11-27 22:15:53 Message-ID: [email protected] (view raw or whole thread) Thread: 2013-11-19 04:30:22 from Brian Wong 2013-11-19 05:15:54 from bricklen 2013-11-19 12:55:18 from Pavel Stehule 2013-11-22 18:53:54 from Hash Tables Inside of Postgres In my last article, I described how Postgres implements the hash join algorithm. Should I boost his character level to match the rest of the group? Psycopg2 Databaseerror Out Of Memory For Query Result Another thing you might want to check: Does the second server have at least as much shared memory configured in the kernel as the first has?

regards Tomas In response to Re: ERROR: out of memory DETAIL: Failed on request of size ??? Psql Out Of Memory Restore The actual error seems fine - it's not requesting a huge amount of memory so presumably the machine was out of memory at that point. Measuring Your SQL Statement’s Blood Pressure If one of the SQL queries in your application is running slowly, use the EXPLAIN ANALYZE to find out what’s going on: > explain analyze https://www.postgresql.org/message-id/[email protected] To find the number of X completed, when can I subtract two numbers and when do I have to count?

Sitecore pre-fetch cache setting clarification Can a bike computer be used on the rear wheel? Postgres Show Work_mem I might be totally hand-waving here. share|improve this answer answered Sep 24 '15 at 7:18 Aaron C. The process fails when run on another machine that has 16 gig of memory with the following error: > > out of memory for query result You didn't mention what client

Psql Out Of Memory Restore

You can check > by examining the resource limits of a running postgresql backend as > shown in /proc/$PG_PID where $PG_PID is the process ID of the backend of > interest. http://stackoverflow.com/questions/26478031/error-out-of-memory-on-machine-with-32gb-ram-and-without-swap-file Any ideas? Postgresql Out Of Memory Failed On Request Of Size Derivatives: simplifying "d" of a number without being over "dx" Counterintuitive polarizing filters Is it illegal to DDoS a phishing page? Out Of Memory For Query Result Pgadmin Subscribe Follow @pat_shaughnessy @pat_shaughnessy Buy my book Ruby Under a Microscope More on Postgres A Look at How Postgres Executes a Tiny Join Discovering the Computer Science Behind Postgres Indexes Following

Browse other questions tagged postgresql or ask your own question. http://fapel.org/out-of/postgresql-error-out-of-memory-sqlstate-53200.php I also tried disabling the bitmap scan and sequence scan to no avail. Sven In response to Re: out of memory for query result at 2006-04-22 19:08:45 from Tom Lane Responses Re: out of memory for query result at 2006-05-03 17:16:52 from Douglas McNaught Content and UI design © 2016 Pat Shaughnessy Pivotal Knowledge Base +1 877.477.2269 Downloads Documentation My Tickets Find the answer to your question All Help & Support Pivotal Greenplum DB Knowledge Out Of Memory For Query Result Postgresql

Could this message be generated because of shared memory issues? Unfortunately, I seem to keep getting this error: DBD::Pg::st execute failed: out of memory for query result DBD::Pg::st fetchrow_array failed: no statement executing This program works fine with less than a At the bottom we see that the join operation took a total of 960ms to finish. Check This Out snipped heaps of lines which I can provide if they are useful ...] --- 2015-04-07 05:33:58 UTC ERROR: out of memory 2015-04-07 05:33:58 UTC DETAIL: Failed on request of size 16.

And it is. Work_mem Postgres From: "Tomas Vondra" To: "Brian Wong" Cc: "Tomas Vondra" , "bricklen" , "pgsql-general(at)postgresql(dot)org" Subject: Re: ERROR: out of memory DETAIL: Failed on request of size ??? share|improve this answer answered Oct 29 '15 at 23:01 mnencia 1,9701122 I think that's just a coincidence in how I wrote the question.

So - take your number of cores and double it - that's a reasonable value for the max number of connections.

Postgres saves the skew table inside the same 4MB working memory buffer, so the primary hash table actually has a bit less than 4MB available to it. Take their blood pressure using the EXPLAIN ANALYZE command; you might find they are memory starved! Do you have a ulimit in place that applies to postgresql? Postgres Memory Usage A larger join query might have many more batches, each holding 4MB of data.

A movie about people moving at the speed of light N(e(s(t))) a string How do you say "you all" in Esperanto? It was more than 500mb free (as in, "heaps of memory!") rather than a hard value. By organizing the values from one table like this, Postgres can later scan over a second table and repeatedly search the hash table to perform the join efficiently. this contact form Select1Restore data from Postgres data files7Postgres: Checkpoints Are Occurring Too Frequently1Postgresql gives strange performance0Postgres 9.3 partitioning table update out of memory error0Postgres: Out of memory0postgres local connection errors out1Postgres error invalid

The rectangle I drew around the hash table above is the working memory buffer assigned to that table. Database servers like Postgres are optimized to handle many small, concurrent requests at the same time. Why are planets not crushed by gravity? Was this article helpful? 0 out of 0 found this helpful Facebook Twitter LinkedIn Google+ Comments © Pivotal Software, Inc.

The whole database only takes up about 13 gig of disk space. The default 1Mb is conservative, but I wouldn't raise work_mem above 128MB for a 3GB instance. de Bruyn 1,1461026 add a comment| up vote 1 down vote It is a bit suspicious that you report the same free memory size as your shared_buffers size.