On Apr 9, 2010, at 8:18 PM, Daniel, Wu wrote: > We have a NFS data volume, reading data from it is so slow(10 minutes to copy > 512M). But since we have 25G free memory, why solaris 10 doesn't cache the > data in the file system cache?
It does. > If the free memory is nearly 0, and the read is bad, that means we reach the > limit of the system. But since we have so much free memory, the system is not > optimized, right? What do I need to look into? iostat will show the latency and queues for I/O to the storage device. -- richard > $> meminfo > RAM _____Total 65408.0 Mb > RAM Unusable 1425.5 Mb > RAM Kernel 3862.5 Mb > RAM Locked 33728.0 Mb > RAM Used 1174.2 Mb > RAM Avail 25217.9 Mb > > Disk _____Total 49150.9 Mb > Disk Alloc 0.0 Mb > Disk Free 49150.9 Mb > > Swap _____Total 102453.1 Mb > Swap Alloc 36413.6 Mb > Swap Unalloc 186.4 Mb > Swap Avail 65853.2 Mb > Swap (MinFree) 8027.9 Mb > -- > This message posted from opensolaris.org > _______________________________________________ > perf-discuss mailing list > perf-discuss@opensolaris.org ZFS storage and performance consulting at http://www.RichardElling.com ZFS training on deduplication, NexentaStor, and NAS performance Las Vegas, April 29-30, 2010 http://nexenta-vegas.eventbrite.com _______________________________________________ perf-discuss mailing list perf-discuss@opensolaris.org
