Out Of Memory Perl Error
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Perl Out Of Memory Reading Large File
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How To Solve Out Of Memory Error In Perl
I'm attempting to build a n-gram language model based on the top 100K words found in the english language wikipedia dump. I've already extracted out the plain text with a modified XML parser written in Java, but need to convert it to a vocab file. In order to do this, I found a perl script that is said to do the job, but lacks instructions on how to execute. Needless to perl ulimit say, I'm a complete newbie to Perl and this is the first time I've encountered a need for its usage. When I run this script, I'm getting an Out of Memory Error when using this on a 7.2GB text file on two separate dual core machines with 4GB RAM and runnung Ubuntu 10.04 and 10.10. When I contacted the author, he said this script ran fine on a MacBook Pro with 4GB RAM, and the total in-memory usage was about 78 MB when executed on a 6.6GB text file with perl 5.12. The author also said that the script reads the input file line by line and creates a hashmap in memory. The script is: #! /usr/bin/perl use FindBin; use lib "$FindBin::Bin"; use strict; require 'english-utils.pl'; ## Create a list of words and their frequencies from an input corpus document ## (format: plain text, words separated by spaces, no sentence separators) ## TODO should words with hyphens be expanded? (e.g. three-dimensional) my %dict; my $min_len = 3; my $min_freq = 1; while (<>) { chomp($_); my @words = split(" ", $_); foreach my $word (@words) { # Check validity against regexp and acceptable use of apostrophe if ((length($word) >= $min_len) && ($word =~ /^[A-Z][A-Z\'-]+$/) && (index($word,"'") < 0 || allow_apostroph
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 Monks concerning the following question: Dear monks, I have a perl script which is trying to read
Perl Catch Out Of Memory Error
some files and storing those lines into a hash. But each file size perl memory usage 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 -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 http://stackoverflow.com/questions/8128774/resolving-out-of-memory-error-when-executing-perl-script usage. Comment on Out of memory!Download Code Replies are listed 'Best First'. Re: Out of memory! by GrandFather (Sage) 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 http://www.perlmonks.org/?node_id=598685 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 (Parson) on Feb 07, 2007 at 04:55UTC "Doctor, it hurts when I do this!" "Then don't do that." So the answer is simple - don't write perl programs that consume more memory than your system can allocate. --chargrill s**lil*; $*=join'',sort split q**; s;.*;grr; &&s+(.(.)).+$2$1+; $; = qq-$_-;s,.*,ahc,;$,.=chop for split q,,,reverse;print for($,,$;,$*,$/) [download] [reply][d/l] Re: Out of memory! by quester (Vicar) on Feb 07, 2007 at 08:34UTC Two other possible, somewhat painful, approaches: 1. Step through the program with the debugger and check the memory size to see where you are in the code when it increases: $ perl -de0 Lo
PERL Beginners I wrote a small script that uses message ID's as unique values and extracts recipient address info. The goal is to count 1019 events per message ID. It also gets the sum of recipients per message ID. The script works fine but http://www.justskins.com/forums/out-of-memory-error-115248.html when it runs against a very large file (2GB+) I receive an out of memory error. Is there a more efficient way of handling the hash portion that is less memory intense and preferably faster? --Paul # Tracking log pr use strict; my $recips; my %event_id; my $counter; my $total_recips; my $count; # Get log file die "You ... Thread Tools Show Printable Version Email this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to out of Threaded Mode December 16th,07:15 PM #1 Out of memory error problem I wrote a small script that uses message ID's as unique values and extracts recipient address info. The goal is to count 1019 events per message ID. It also gets the sum of recipients per message ID. The script works fine but when it runs against a very large file (2GB+) I receive an out of memory error. Is there a more efficient way of handling the hash portion out of memory that is less memory intense and preferably faster? --Paul # Tracking log pr use strict; my $recips; my %event_id; my $counter; my $total_recips; my $count; # Get log file die "You must enter a tracking log. \n" if $#ARGV <0; my $logfile = shift; open (LOGFILE, $logfile) || die "Unable to open $logfile because\n $!\n"; foreach (