On 1/26/2011 11:22 AM, Brian Raven wrote: > -----Original Message----- > From: perl-win32-users-boun...@listserv.activestate.com > [mailto:perl-win32-users-boun...@listserv.activestate.com] On Behalf Of > John Deighan > Sent: 26 January 2011 15:18 > To: perl-win32-users@listserv.ActiveState.com; us...@httpd.apache.org; > modp...@perl.apache.org > Subject: experiencing Out of memory errors > >> We have an Apache/mod_perl application running under Windows Server2003 >> ...etc. >> help us. > > Unless it is fairly easy to create a 64 bit setup, it might be worth > expending some effort in checking whether your belief that you don't > have a memory leak is sustainable. This may help. > > http://modperlbook.org/html/14-2-6-Memory-Leakage.html
Thanks for the help, Brian. I'll check it out. That does remind me, however, that we've tried to analyze how much memory some of our larger data structures take up. We'd previously done that using a function in the Devel::Size library named total_size. You pass it the reference to a data structure, like an array or hash, and it tells you how many total bytes it uses, including traversing all references it contains, recursively. However, in an effort to reduce the memory we use (and at the same time speed up response time), we've started using thread-shared memory for cached data. Since we're on Windows, Apache starts a single process with multiple threads (technically, it's 2 processes, but the first just shuttles the request to the 2nd, which uses one of the threads to handle it). Using thread-shared data structures means that when one of the threads (i.e. "Perl interpreters") has data to cache, other threads can find and use that data since it's stored in a area accessible to all threads. Unfortunately, the Devel::Size functions don't work correctly with thread-shared memory and the total_size function returns erroneous information (specifically, no matter how large the data structure is, it reports the same, rather small size. Perhaps it's unable to follow references at all, but I really don't know what the problem is). Does anyone know of an alternative way to determine the amount of memory used by a Perl data structure? use Devel::Size qw(total_size); _______________________________________________ Perl-Win32-Users mailing list Perl-Win32-Users@listserv.ActiveState.com To unsubscribe: http://listserv.ActiveState.com/mailman/mysubs
