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Top Forums UNIX for Advanced & Expert Users Separated hard disks for Operating System and applications - better IO performance ? Post 302462249 by petrospis on Wednesday 13th of October 2010 04:14:26 PM
Old 10-13-2010
This is indeed interesting.
Does the application strictly use disk 1 for its disk I/O ?

There seems to be lots of activity on disk 0 which is directly or indirectly caused by the application.

In the case it does it indicetly, it would be interesting to see where this disk I/O originates.
 

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nfsstat(8)						      System Manager's Manual							nfsstat(8)

NAME
nfsstat - Network File System statistics SYNOPSIS
/usr/bin/nfsstat [-i interval] [-23cnsrz] [system] OPTIONS
Displays summary information at the specified interval. Displays client NFS and RPC information, unless otherwise specified by either the -n or -r option. Displays server NFS and RPC information, unless otherwise specified by either the -n or -r option. Displays NFS client and server information, unless otherwise specified by either the -c or -s option. Displays RPC information for the client and server side, unless otherwise specified by either the -c or -s option. Specifies NFS version 2 statistics when specified with the -n option. If neither the -2 nor -3 option is specified, version 2 and version 3 statistics are displayed. Specifies NFS version 3 statistics when specified with the -n option. If neither the -2 nor -3 option is specified, version 2 and version 3 statistics are displayed. Reinitializes statis- tics. Used to set NFS client/server or RPC client/server statistics to zero. You must be logged in as superuser to use this command. DESCRIPTION
The nfsstat command displays statistical information about the Network File System (NFS) and Remote Procedure Call (RPC) interfaces in the kernel (by reading /dev/kmem). It can also be used to reinitialize this information. If no options are given, nfsstat displays both server RPC and NFS version 2 and version 3 information, and client RPC and NFS version 2 and version 3 information. The system argument specifies the file containing the system's name list. Otherwise, /vmunix is used. FILES
Specifies the kernel memory. nfsstat(8)
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