Error Out Of Memory Postgresql
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Postgresql Out Of Memory While Reading Tuples
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In Memory Postgresql Database
takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top PostgreSQL Error: out of memory up vote 2 down vote favorite I'm trying to run a query that should return around 2000 rows, but my RDS-hosted PostgreSQL 9.3 database is giving me the error "out of
Postgresql In Memory Table
memory DETAIL: Failed on request of size 2048.". What does that mean? My instance has 3GB of memory, so what would be limiting it enough to run out of memory with such a small query? Edit: SHOW work_mem; "1024GB" I can't show the full SQL, but it's attempting to perform a pivot. I have two primary tables, library and book, which points back to a library record. My query attempts to find the most popular book for each of the last 12 months for each library record, and join them to a separate column in the result queryset, to have something like: library_id, month_1_book_id, month_2_book_id, month_3_book_id, ... Explain shows this results in quite a few loops: explain select * from myapp_library_get_monthly_popular where id in (5495060, 5495059, 5495048) Nested Loop Left Join (cost=3645798.54..3750412.91 rows=3 width=2980) -> Nested Loop Left Join (cost=3645798.10..3750388.98 rows=3 width=2994) -> Nested Loop Left Join (cost=3645797.66..3750365.05 rows=3 width=2976) -> Nested Loop Left Join (cost=3645797.23..3750341.13 rows=3 width=2958) -> Nested Loop Left Join (cost=3645796.79..3750317.20 rows=3 width=2940) -> Nested Loop Left Join (cost=3645796.35..3750293.27 rows=3 width=2922) -> Nested Loop Left Join (cost=3645795.91..3750269.35 rows=3 width=2904) -> Nested Loop Left Join (cost=3645795.48..3750245.42 row
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Postgresql In Memory Storage
Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up postgresql memory management ERROR: out of memory on machine with 32GB RAM and without swap file up vote 2 down vote favorite 1 I'm running postgresql 9.3 on a machine with 32GB ram, with 0 swap. There are up to 200 clients connected. There's 1 http://dba.stackexchange.com/questions/64570/postgresql-error-out-of-memory other 4GB process running on the box. How do I interpret this error log message? How can I prevent the out of memory error? Allow swapping? Add more memory to the machine? Allow fewer client connections? Adjust a setting? example pg_top: last pid: 6607; load avg: 3.59, 2.32, 2.61; up 16+09:17:29 20:49:51 113 processes: 1 running, 111 sleeping, 1 uninterruptable CPU states: 22.5% user, 0.0% nice, 4.9% system, 63.2% idle, 9.4% iowait Memory: 29G used, 186M free, 7648K buffers, 23G cached DB activity: 2479 http://stackoverflow.com/questions/26478031/error-out-of-memory-on-machine-with-32gb-ram-and-without-swap-file tps, 1 rollbs/s, 217 buffer r/s, 99 hit%, 11994 row r/s, 3820 row w/s DB I/O: 0 reads/s, 0 KB/s, 0 writes/s, 0 KB/s DB disk: 149.8 GB total, 46.7 GB free (68% used) Swap: example top showing the only other significant 4GB process on the box: top - 21:05:09 up 16 days, 9:32, 2 users, load average: 2.73, 2.91, 2.88 Tasks: 247 total, 3 running, 244 sleeping, 0 stopped, 0 zombie %Cpu(s): 22.1 us, 4.1 sy, 0.0 ni, 62.9 id, 9.8 wa, 0.0 hi, 0.7 si, 0.3 st KiB Mem: 30827220 total, 30642584 used, 184636 free, 7292 buffers KiB Swap: 0 total, 0 used, 0 free. 23449636 cached Mem PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 7407 postgres 20 0 7604928 10172 7932 S 29.6 0.0 2:51.27 postgres 10469 postgres 20 0 7617716 176032 160328 R 11.6 0.6 0:01.48 postgres 10211 postgres 20 0 7630352 237736 208704 S 10.6 0.8 0:03.64 postgres 18202 elastic+ 20 0 8726984 4.223g 4248 S 9.6 14.4 883:06.79 java 9711 postgres 20 0 7619500 354188 335856 S 7.0 1.1 0:08.03 postgres 3638 postgres 20 0 7634552 1.162g 1.127g S 6.6 4.0 0:50.42 postgres postgresql.conf: max_connections = 1000 # (change requires restart) shared_buffers = 7GB # min 128kB work_mem = 40MB # min 64kB maintenance_work_mem = 1GB # min 1MB effective_cache_size = 20GB .... log: ERROR: out of memory DETAIL: Failed on request of size 67108864. STATEMENT: SELECT "package_texts".* FROM "package_texts" WHERE "package_texts"."id" = $1 LIMIT 1 TopMemoryContext: 798624 total
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies http://stackoverflow.com/questions/37621851/postgres-update-query-producing-out-of-memory-error of this site About Us Learn more about Stack Overflow the company http://www.pateldenish.com/2013/10/can-postgres-9-2-upgrade-cause-out-of-memory-error.html Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a out of minute: Sign up Postgres 'UPDATE' query producing out of memory error up vote 0 down vote favorite I have two tables: CREATE TABLE public.organization ( id_organization SERIAL PRIMARY KEY, name varchar, country varchar, prod_id varchar ); CREATE TABLE public suborganization ( id_suborganization SERIAL PRIMARY KEY, id_organization bigint references organization(id_organization) ON UPDATE CASCADE ON DELETE CASCADE, full_address varchar, prod_id varchar ); Both tables out of memory are populated apart from the suborganization.id_organization. I'm trying to populate this column using the following statement: UPDATE suborganization SET id_organization = organization.id_organization FROM organization WHERE suborganization.prod_id = organization.prod_id; However, Postgres is producing the following error message and failing to populate the foreign key: ERROR: out of memory DETAIL: Failed on request of size 8 These are large tables, approximately 200 million rows but I'm running it on a machine with 62.8GB of RAM and work_mem set to 4MB. Can anyone explain why I'm getting this error message? Is it simply a hardware issue or do I need to reconfigure postgres? Or is it my method that is flawed, is there a better way to create this foreign key? PotgreSQL 9.4.7 running on Red Hat Enterprise Linux Server 6.7 sql postgresql out-of-memory relational-database share|improve this question asked Jun 3 at 19:14 Matt 105 1) what is the cardinality of prod_id (in both tables) ? It could be that you are updating the same target rows repeatedly. 2) always add a WHERE suborganisation.id_organization <> organization.id_organization clause to update-queries to avoid same valued updates. –wildplas
from DonorsChoose.org with the need of “a serious Postgres expert” to solve the problem they have been experiencing and blocker for number of projects at hand. They heard good things about OmniTI from technology clubs and communities in NYC. DonorsChoose.org is an online charity that makes it easy for anyone to help students in need. Public school teachers from every corner of America post classroom project requests on their site, and you can give any amount to the project that most inspires you. This year, in beginning of July , they migrated Postgres database server from virtual hardware to high capacity bare-metal server and upgraded their databases from Postgres 8.2 to Postgres 9.2. As everyone hope after upgrade, website was much faster in response time and they should be happy after upgrading their database to Postgres 9.2. That is the case for them as well Yes, they are happy Postgres user except some of the queries used to run without any issue are causing Out of Memory errors now ! Sometimes, the queries were causing segmentation fault by Signal 11 Weird, right ? Here is the email received that describes the problem: We’ve been happy Pg users for years now and have a pretty good command of what’s going on. We recently upgraded to 9.2.x and moved onto new hardware at the same time. Everything’s screaming fast as we’d hoped and working well, but… Now our most-intensive queries are failing with an “out of memorySQL state: 53200″ error. Not in production mind you, these are long-running queries we execute manually against a slave to infrequently do big exports. On our old Pg version 8.2.x and much skimpier hardware, the job would take forever but complete, which was fine for the purpose. Now it’s on newer software with much more memory and CPU, but failing to complete. It seems to be failing on reports that use temporary tables that weren’t analyzed, and large queries during “hash join” and “merge join” operations. We’ve surely got something configured wrong, but we’ve been banging our heads against the wall and are out of ideas, eg. we’ve trie