How To Solve Out Of Memory Error In Perl
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Perl Out Of Memory Windows
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takes a minute: Sign up Why does my Perl script die with an “out of memory” exception? up vote 1 down vote favorite I need to read a 200mb "space"-separated file line-by-line and collect its contents into an array. Every time I run the script, Perl throws an "out of memory" exception, but I don't understand why! Some advice please? perl catch out of memory error #!/usr/bin/perl -w use strict; use warnings; open my $fh, "<", "../cnai_all.csd"; my @parse = (); while (<$fh>) { my @words = split(/\s/,$_); push (@parse, \@words); } print scalar @parse; the cnai file looks like this: it contains 11000 rows and 4200 values, seperated by "space", per line. VALUE_GROUP_A VALUE_GROUP_B VALUE_GROUP_C VALUE_GROUP_A VALUE_GROUP_B VALUE_GROUP_C VALUE_GROUP_A VALUE_GROUP_B VALUE_GROUP_C VALUE_GROUP_A VALUE_GROUP_B VALUE_GROUP_C The code above is just a stripped down sample.The final script will store all values in a hash and write it to a database later . But first, I have to solve that memory problem! database perl memory share|improve this question edited Aug 17 '10 at 2:21 Greg Bacon 75.6k17147197 asked Feb 4 '10 at 16:45 Floopy-Doo 63117 Code said while (<$fh>) but it was not displayed in the markup. –mob Feb 4 '10 at 16:50 @floppy-doo Please edit your question to give us an idea what the contents of cnai_all.csd look like? –Greg Bacon Feb 4 '10 at 16:55 See also: stackoverflow.com/questions/1663498/finding-a-perl-memory-leak –Ether Feb 4 '10 at 21:53 If all you wa
RecentThreads NewestNodes Donate What'sNew on Feb 07, 2007 at 04:23UTC ( #598685=perlquestion: print w/replies, xml ) Need Help?? jesuashok has asked for the wisdom of the Perl perl memory usage Monks concerning the following question: Dear monks, I have a perl script which is trying to read some files and storing those lines into a hash. But each file size comes around 3MB or more. when I run the script I got the following error [belief] /apps/inst2/metrica/analysis_ericsson/schema_analysis> perl s +chema_analysis.pl -r rename_columns http://stackoverflow.com/questions/2201432/why-does-my-perl-script-die-with-an-out-of-memory-exception -u /apps/inst2/metrica/anthony/Er +icson_R10_Onsite/VFOZ_BACKUP/summaryspr/ -y /apps/inst2/metrica/anth +ony/Ericson_R10_Onsite/VFOZ_BACKUP/metalayer/ \ > -o only_in_old_schema -p /apps/inst2/metrica/anthony/Ericson_R10_Ons +ite/VFOZ_BACKUP/reportspr/ Out of memory! [download] Is there any way, can I resolve this Issue. Is it possible to control the memory usage. Comment on Out of memory!Download Code Replies are listed 'Best First'. Re: Out of memory! by GrandFather (Sage) http://www.perlmonks.org/?node_id=598685 on Feb 07, 2007 at 04:29UTC Is there any way you can post sample code that demonstrates the issue and indicate how many files are being manipulated? We need a little more information than "I have a problem with large hashes. How do I solve it?" if you want a better answer than "Use a tied hash" or "Install more memory". DWIM is Perl's answer to Gödel [reply] Re: Out of memory! by Tanktalus (Canon) on Feb 07, 2007 at 04:55UTC Generally speaking, when I've had that problem, it was that there was a memory limit via ulimit - removing that limit 'solved' the problem. At least, insofaras letting me use way more memory. Perhaps you have an underlying memory problem - wasting memory or leaking it, we can't be sure from your description. Assuming that not to be the case, though, it's probably a ulimit on memory.[reply] Re: Out of memory! by chargrill (Pars
Start 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 about Stack Overflow the company Business Learn more about hiring developers or posting ads http://serverfault.com/questions/365032/perl-script-and-out-of-memory-errors with us Server Fault Questions Tags Users Badges Unanswered Ask Question _ Server Fault is a question http://www.unix.com/shell-programming-and-scripting/139512-out-memory-error-due-sort-perl-how-resolve.html and answer site for system and network administrators. Join them; it only 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 Perl script and out of memory errors up vote 1 down vote favorite We have a midsized server with 48GB of RAM and are attempting to import a out of list of around 100,000 opt-in email subscribers to a new list management system written in Perl. From my understanding, Perl doesn't have imposed memory limits like PHP, and yet we are continuously getting internal server errors when attempting to do the import. When investigating the error logs, we see that the script ran out of memory. Since perl doesn't have a setting to limit the memory usage (as far as I can tell) why are we getting these errors? I doubt a small import out of memory like this is consuming 48GB of ram. We have compromised and split the list into chunks of 10,000, but would like to figure out the root cause for future fixes. This is a CentOS machine with Litespeed as the web server. perl share|improve this question asked Feb 29 '12 at 20:41 Kevin 257313 2 Silly question - 64bit OS or PAE? When you run "top" how much RAM does perl consume? –Tom Newton Feb 29 '12 at 20:45 Sorry - new to debugging and wasn't sure what info was relevant. 64 bit OS and perl doesn't even show up in top. mail.cgi (The script being used) does show up and is using 25% CPU and .3% ram before the error occurs. –Kevin Feb 29 '12 at 21:54 What is the error you are getting? How do you know its running out of memory? –Patrick Mar 22 '12 at 22:44 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote It's hard to debug without seeing code, but you may be reading the file to the memory, instead of processing it line by line using foreach $line (
Scripting Unix shell scripting - KSH, CSH, SH, BASH, PERL, PHP, SED, AWK and shell scripts and shell scripting languages here. Search Forums Show Threads Show Posts Tag Search Advanced Search Unanswered Threads Find All Thanked Posts Go to Page... unix and linux operating commands Is this "Out of Memory!" error due to sort() of perl how to resolve it? Shell Programming and Scripting Thread Tools Search this Thread Display Modes #1 07-02-2010 lilili07 Registered User Join Date: Feb 2009 Last Activity: 26 October 2010, 7:58 PM EDT Posts: 9 Thanks: 1 Thanked 0 Times in 0 Posts Is this "Out of Memory!" error due to sort() of perl how to resolve it? I am running a program written in perl script and it is stopped with "Out of memory!" error. This is very strange because at the time then the program is aborted, it only used 4GB RAM and there are still 30GB free physical memory left in the system. I check the perl script and found the program stopped at the place when it tried to sort some string set. Look at this: "foreach my $string (sort keys %{$stringSet->{'strings'}}) {" where the stringSet is composed of 4731718 string and the length of each string is around 30 bytes. Do you think the Out of memory issue is due to the sort function? if yes, then how does the sort in perl is implemented and how can I rewrite it? Thanks, ---------- Post updated at 05:37 PM ---------- Previous update was at 05:20 PM ---------- Some more details FYI: The program calls sort function because it got the data and tried to sort them and then store them to an xml file. Here is the prstat and vmstat result when the program stopped: prstat -a |grep