[CLUE-Tech] weird apache error?

[Todd Williams]

> Here are some files from /proc/sys/kernel:
> 
> [root kernel]# /bin/pwd
> /proc/sys/kernel
> [root kernel]# cat sem
> 250     32000   32      128
> [root kernel]# cat shmall
> 2097152
> [root kernel]# cat shmmax
> 33554432
> [root kernel]# cat shmmni
> 4096

Look like default kernel numbers.


> Do you know how to clear a kernel semaphore array or shared memory 
> segment?  Now that I know what the array ID or the shared memory ID is,
> I might be able to manually clear/free it the next time I have this
> problem, if I knew how to do it.


man ipcrm


 > There is no /tmp clearing on reboot.  Since a reboot clears the problem,
 > it seems as if a data structure in the kernel's memory was not freed by
 > apache when the process exited, so when a new instance of apache is
 > starting, it is unable to gain access to that data structure because the
 > kernel has not freed it from the original process that owned it.

You may be on the right trail there:


Todd Williams