topic Re: IPC resources for non-existent process still reported by ipcs in Operating System - HP-UX

IPC resources for non-existent process still reported by ipcs

Fedon Kadifeli — Mon, 06 Jun 2005 01:13:35 GMT

When I run an "ipcs -a" command I see many IPC (memory, queue, semaphore) resources still reported. However I know that there are no processes using these resources and for example for shared memories I see NATTCH=0.

Is this a bug?

Re: IPC resources for non-existent process still reported by ipcs

Steven E. Protter — Mon, 06 Jun 2005 01:22:06 GMT

Its probably not a bug.

At least not an OS bug you are hinting toward.

It could be the proceses where not shut down cleanly, leaving the shared memory alloocated.

It could be poor application programming that has created the dreaded memory leak. !!!

SEP

Re: IPC resources for non-existent process still reported by ipcs

Fedon Kadifeli — Mon, 06 Jun 2005 01:25:49 GMT

I knew that when a process exits, dies or killed, all the resources it created are deleted provided these are not used by other processes.

How am I supposed to do this "garbage collection?"

Re: IPC resources for non-existent process still reported by ipcs

Fedon Kadifeli — Mon, 06 Jun 2005 08:05:40 GMT

I removed the resources manually using "ipcrm". After all those years I have forgotten this command! :)