Org.postgresql.util.psqlexception Error Out Of Shared Memory
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Postgres Max_locks_per_transaction
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Postgres Shared Memory
of test records. It looks something like this: CREATE OR REPLACE FUNCTION _miscRandomizer(vNumberOfRecords int) RETURNS void AS $$ declare -- declare all the variables that will be used begin select into vTotalRecords count(*) from tbluser; vIndexMain := vTotalRecords; loop exit when vIndexMain >= vNumberOfRecords + vTotalRecords; -- set some other variables that will be used for the insert -- insert record with these variables in tblUser -- insert records in some other tables --
Postgresql Out Of Memory
run another function that calculates and saves some stats regarding inserted records vIndexMain := vIndexMain + 1; end loop; return; end $$ LANGUAGE plpgsql; When I run this query for 300 records it throws the following error: ********** Error ********** ERROR: out of shared memory SQL state: 53200 Hint: You might need to increase max_locks_per_transaction. Context: SQL statement "create temp table _counts(...)" PL/pgSQL function prcStatsUpdate(integer) line 25 at SQL statement SQL statement "SELECT prcStatsUpdate(vUserId)" PL/pgSQL function _miscrandomizer(integer) line 164 at PERFORM The function prcStatsUpdate looks like this: CREATE OR REPLACE FUNCTION prcStatsUpdate(vUserId int) RETURNS void AS $$ declare vRequireCount boolean; vRecordsExist boolean; begin -- determine if this stats calculation needs to be performed select into vRequireCount case when count(*) > 0 then true else false end from tblSomeTable q where [x = y] and [x = y]; -- if above is true, determine if stats were previously calculated select into vRecordsExist case when count(*) > 0 then true else false end from tblSomeOtherTable c inner join tblSomeTable q on q.Id = c.Id where [x = y] and [x = y] and [x = y] and vRequireCount = true; -- calculate counts and store them in temp table create temp table _counts(...); insert into _counts(x, y, z) select uqa.x, uqa.y, count(*) as aCount from tblSomeOtherTable uqa inner join tblSomeTable
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more restart postgres about Stack Overflow the company 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 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up org.postgresql.util.PSQLException: ERROR: out of shared memory up vote 0 down vote favorite http://stackoverflow.com/questions/16490664/error-out-of-shared-memory I am calling a function having more than 200 DROP Table Statements using JAVA and I am getting org.postgresql.util.PSQLException: ERROR: out of shared memory. What approach should i follow in order to avoid out of shared memomry ? PS : Restriction is that I can't change any parameters related to PostgresSQL. java postgresql share|improve this question asked Oct 3 '11 at 12:17 Abhishek Parikh 61217 By "function" you http://stackoverflow.com/questions/7634871/org-postgresql-util-psqlexception-error-out-of-shared-memory mean a server side function or a Java method? Is the cause of the exception on the server-side or on the client-side? Your little information bits don't provide enough information even for guessing. –A.H. Oct 3 '11 at 12:48 By Function I mean a PostgresSQL Function(Procedure). The exception is at the end from where i am calling the function that is on the JAVA Side. –Abhishek Parikh Oct 3 '11 at 13:31 add a comment| 1 Answer 1 active oldest votes up vote 1 down vote If the cause of the error is on the server side: In PostgreSQL a function is always executed inside a transaction. DO blocks are anonymous functions and are handled the same way. And because even DML commands like CREATE or DROP are transactional in PostgreSQL, these commands also stress the usual resources used for ROLLBACK and COMMIT. My guess is that dropping a huge number of large tables eats to much memory. So if you don't need transactional behaviour in your function, the easiest way is to split the large function into several smaller ones. Call each function in a separate transaction. share|improve this answer answered Oct 3 '11 at 13:51 A.H. 35k96085 add a comment| Your An
Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ ERROR: out of shared memory Hello! I have to manage an application http://postgresql.nabble.com/ERROR-out-of-shared-memory-td1878803.html written in java which call another module written in java which uses Postgre DBMS in a Linux environment. I'm new to Postgres. The problem is that for large amounts of data the application throws an: http://www.ca.com/us/services-support/ca-support/ca-support-online/knowledge-base-articles.tec1920756.html org.postgresql.util.PSQLException: ERROR: out of shared memory Please, have you any idea why this error appears and what can I do in order to fix this? Are there some Postgre related parameters I should tune out of (if yes what parameters) or is something related to the Linux OS? Thank you very much With best regards, Sorin Tom Lane-2 Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Re: ERROR: out of shared memory "Sorin N. Ciolofan" <[hidden email]> writes: > I have to manage an application written in java which call another module > written out of shared in java which uses Postgre DBMS in a Linux environment. I'm new to > Postgres. The problem is that for large amounts of data the application > throws an: > org.postgresql.util.PSQLException: ERROR: out of shared memory AFAIK the only very likely way to cause that is to touch enough different tables in one transaction that you run out of lock entries. While you could postpone the problem by increasing the max_locks_per_transaction setting, I suspect there may be some basic application misdesign involved here. How many tables have you got? regards, tom lane ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend Merlin Moncure-2 Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ Re: ERROR: out of shared memory On 3/26/07, Tom Lane <[hidden email]> wrote: > "Sorin N. Ciolofan" <[hidden email]> writes: > > I have to manage an application written in java which call another module > > written in java which uses Postgre DBMS in a Linux environment. I'm new to > > Postgres. The problem is that for large amounts of data the application > > throws an: > > org.postgresql.util.PSQLException: E
productResults.length + resourceResults.length > 0 ? 'See all Search Results' : 'Full site search'}} > > CA Support Online > Support by Product > Support by Product Getting "Out of Shared Memory" Errors for Postgres database Document ID:TEC1920756 Last Modified Date:02/13/2015 {{active ? 'Hide' : 'Show'}} Technical Document Details Products CA Application Performance Management Releases CA Application Performance Management:Release:CA APM 9.7 Components WILY CEM:APMCEM Description: The Postgres APM database is seeing "Out of Shared Memory Errors." What can be done about this? Issue: Customer has a MOM and an APM Postgres Database on the same server. Shared Memory Errors appear when doing one of two things: 1. Starting the EM and the APM Database is running an update query that consumes most of the EM memory. The query is the following update ts_us_sessions_map set ts_soft_delete=true, ts_ageout_time='2013-01-21 17:45:00' where ts_soft_delete=false and ts_last_update<'2013-01-21 16:45:00' and ts_app_id=1; However, the database table involved is empty and executing the following query returns a value of zero: select count (*) from ts_us_sessions_map; 2. Running the query directly on the APM database. apmdes01:/opt/wily_data/data/bin> PGUSER=admin PGPASSWORD="admin" psql -q -d cemdb cemdb=> update ts_us_sessions_map set ts_soft_delete=true, ts_ageout_time='2015-01-21 17:45:00' where ts_soft_delete=false and ts_last_update<'2015-01-21 16:45:00' and ts_app_id=1; WARNING: out of shared memory ERROR: out of shared memory HINT: You might need to increase max_locks_per_transaction. cemdb-> \q Solution: Here are some things to investigate should this issue occurs 1. Increase max_locks_per_transaction to at least 200. 2. If on a UNIX system, run the ipcs command to check the Postgres shared memory. A link is below. http://www.thegeekstuff.com/2010/08/ipcs-command-examples/ 3. Increase the APM pool connections (c3p0) as needed 4. See if Session information is needed for the first place. Session map tables can get very large. 5. See the APM Database Maintenance Tech Note for more info. https://communities.ca.com/servlet/JiveServlet/downloadBody/117511715-102-2-13530/20140424%20Database%20Maintenance.pdf 6. Following the best practice of placing the APM database on its own server to eliminate m