On 08/04/2014 01:24 AM, John Hearns wrote: > Mark, you are of course correct. > Flush often and flush early! > > As an aside, working with desktop systems with larger amounts of memory > I would adjust the 'swappiness' tunable > and also the min_free_kbytes. > Min_free_kbytes in Linux is by default set very low for modern high > memory systems. > I had systems with 128Gbytes of RAM which would lock up in a similar > fashion as you describe. Setting higher min_free_kbytes helped with the > 'system paging itself into the deck' type of behaviour. > See: > https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-memory-tunables.html
Agreed, and even more so when you have systems with hundreds of gigabytes of RAM whose dirty buffers are backed by a single NFS server with a fraction of that RAM for write cache. Skylar _______________________________________________ Beowulf mailing list, [email protected] sponsored by Penguin Computing To change your subscription (digest mode or unsubscribe) visit http://www.beowulf.org/mailman/listinfo/beowulf
