[GemStone-Smalltalk] Problems starting my stone.

Dale Henrichs dale.henrichs at gemtalksystems.com
Wed Oct 23 15:10:21 PDT 2019

I saw Apps in your path and figured (wrongly) that you were running on a 
mac with the known problem .... I've never seen a problem with shared 
memory on a linux system that wasn't caused by anything but "not enough 
shared memory" ..

In this particular case it seems that the `AllocateMemory` error is 
likely that there isn't enough swap space for the stopStone gem to run 
.. this is the analysis of our vm engineer:

    GemStone has done an mmap( MAP_NORESERVE ) of a large memory region (perhaps 100MB)
    A subsequent mmap( MAP_PRIVATE | MAP_FIXED )  to bring into
    use a small part (64KB) of that region has failed.

    Check the memory summary as shown by /usr/bin/top
    and possibly sort the output of top by memory usage (interactive top, M key )
    to find unexpected old processes holding a lot of memory .

    How much swap do you have configured ?   check with  /sbin/swapon - s  .
    We recommend at least 1GB swap for 8GB Ram.  mmap can fail prematurely
    if there is no swap configured.

    If you don't have any swap partitions,
    you can create a swap file on a filesystem
       fallocate --length 1GiB swapfile
       mkswap  swapfile
       swapon  swapfile
    Then add an entry /etc/fstab  , sequenced after mounting the file system of swapfile
    to automatically mount the swap file at next reboot.


On 10/22/19 2:23 AM, ian via GemStone-Smalltalk wrote:
> Dale,
> Yes, every time without fail.
> I am using Debian on a Dell box.
> Thx
> --
> Sent from: http://forum.world.st/Gemstone-S-f1461796.html
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