> >> As you can see, even though the resident size of MySQL is < 40G, the >> system is still using close to 16G of swap. At first we thought that >> ZFS arc cache was causing this to happen, but we've limited it to 2G,
> Perhaps this is due to reserved anonymous memory mappings which are > not really being used. In this case, the backing store is reserved in > case the pages are ever made dirty and need to be paged out. Perhaps. My understanding was that it would reserve at process start, but if not needed it wouldn't use that swap. When the process starts swap usage is at <1G. It takes about a 2-3 days, even after resident memory has reached its peak of ~45G. Maybe that's normal. > Use 'pmap -x' on a suspect process to see how it is using memory, > including its memory mappings. I would, but it totally hangs the process while inspecting, at least that's the observed effect. _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
