> 2012-06-14 19:11, tpc...@mklab.ph.rhul.ac.uk wrote:
> >> In message <201206141413.q5eedvzq017...@mklab.ph.rhul.ac.uk>,
> >> tpc...@mklab.ph.r
> >> hul.ac.uk writes:
> >>> Memory: 2048M phys mem, 32M free mem, 16G total swap, 16G free swap
> >> My WAG is that your "zpool history" is hanging due to lack of
> >> RAM.
> > Interesting. In the problem state the system is usually quite responsive,
> > eg. not memory trashing. Under Linux which I'm more
> > familiar with the 'used memory' = 'total memory - 'free memory', refers to
> > physical memory being used for data caching by
> > the kernel which is still available for processes to allocate as needed
> > together with memory allocated to processes, as opposed to
> > only physical memory already allocated and therefore really 'used'. Does
> > this mean something different under Solaris ?
> Well, it is roughly similar. In Solaris there is a general notion
Thanks for the detailed explanation of ZFS memory usage. Special
thanks also to John D Groenveld for the initial suggestion of a lack of RAM
problem. Since up-ing the RAM from 2GB to 4GB the machine has sailed though
the last two Sunday mornings w/o problem. I was interested to
subsequently discover the Solaris command 'echo ::memstat | mdb -k' which
reveals just how much memory ZFS can use.
Tom Crane, Dept. Physics, Royal Holloway, University of London, Egham Hill,
Egham, Surrey, TW20 0EX, England.
Email: T.Crane@rhul dot ac dot uk
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