IPC::Shareable compilation

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

I'm trying to install/use the IPC::Shareable module on RedHat 7, which I clean installed over 6.2 this morning. The module compiles fine, but will fail a 'make test' with the message:

Munged shared memory segment (size exceeded?)

The README advises: make test may fail with the message 'Munged shared memory segment (size exceeded?)' This is likely because the tests are exceeding the maximum size of a shared memory segment (SHMMAX) or the system-wide limit on shared memory size (SHMALL). The only solution is to increase SHMMAX and/or SHMALL for the system. Consult your system documentation for how to do this.

OK, I found how to set a new SHMMAX (/proc/sys/kernel/shmmax), and set it to 80M, 100M, 200M, and 500M without any change. Has anyone else run into this? Any ideas?

more info: the module will install, but using the included example in the man page, i get the memory seg munged message, and also this error:

IPC::Shareable::SharedMem: shmget: No such file or directory
 at /usr/lib/perl5/site_perl/5.6.0/IPC/Shareable.pm line 456

hmmmm.... isn't shmget part of the standard SysV IPC tools? or is this just a symptom of the larger problem?

Comment on IPC::Shareable compilation

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Re: IPC::Shareable compilation by dchetlin (Friar) on Dec 27, 2000 at 05:22 UTC
I've not been able to get IPC::Shareable to compile in over a year. I don't know why, but it seems to be abandoned. I recommend IPC::ShareLite, which does everything Shareable does, but faster and easier -- and it compiles. -dlc	[reply]
Re (tilly) 1: IPC::Shareable compilation by tilly (Archbishop) on Dec 27, 2000 at 07:54 UTC
Be warned. *.0 releases tend to be buggy. Red Hat in particularly has a reputation for that, and they seem determined to live down to it. If you want to compile your own stuff, then the one distribution of Linux I would tell you not to use is Red Hat 7.0. Wait for 7.1. Try out another distribution. (I happen to use Debian.) Downgrade back to 6.2.	[reply]