10-04-2013
In terms of comparison I would also want to see the output of vmstat -s of the systems you are comparing.
It is too simple to assume that your memory is full because of file caching, unless you have statistics to show that memory is being used for caching. (vmstat -s also can say something here).
Let's assume that you have had some paging to/from paging space over the course of time. You responses may be taking longer because data that should be in (computational) memory is in paging space (where computational memory goes when AIX runs out of space).
Frequently databases do not benefit from file caching, some do, but not all. Rather than have needless page stealing activity there are different mount options you could choose (e.g., cio, rbr, rbw, rbrw - just to mention "two" (rb* are all releases behind options - one behavior type).
Hope this helps!
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LEARN ABOUT DEBIAN
netrestrict
NETRESTRICT(5) AFS File Reference NETRESTRICT(5)
NAME
NetRestrict - Defines interfaces not to register with AFS servers
DESCRIPTION
There are two NetRestrict files, one for an AFS client and one for an AFS File Server or database server. The AFS client NetRestrict file
specifies the IP addresses that the client should not register with the File Servers it connects to. The server NetRestrict file specifies
what interfaces should not be registered with AFS Database Servers or used to talk to other database servers.
Client NetRestrict
The NetRestrict file, if present in a client machine's /etc/openafs directory, defines the IP addresses of the interfaces that the local
Cache Manager does not register with a File Server when first establishing a connection to it. For an explanation of how the File Server
uses the registered interfaces, see NetInfo(5).
As it initializes, the Cache Manager constructs a list of interfaces to register, from the /etc/openafs/NetInfo file if it exists, or from
the list of interfaces configured with the operating system otherwise. The Cache Manager then removes from the list any addresses that
appear in the NetRestrict file, if it exists. The Cache Manager records the resulting list in kernel memory.
The NetRestrict file is in ASCII format. One IP address appears on each line, in dotted decimal format. The order of the addresses is not
significant. The value 255 is a wildcard that represents all possible addresses in that field. For example, the value 192.12.105.255
indicates that the Cache Manager does not register any of the addresses in the 192.12.105 subnet.
To display the addresses the Cache Manager is currently registering with File Servers, use the fs getclientaddrs command.
Server NetRestrict
The NetRestrict file, if present in the /var/lib/openafs/local directory, defines the following:
o On a file server machine, the local interfaces that the File Server (fileserver process) does not register in the Volume Location
Database (VLDB) at initialization time.
o On a database server machine, the local interfaces that the Ubik synchronization library does not use when communicating with the
database server processes running on other database server machines.
As it initializes, the File Server constructs a list of interfaces to register, from the /var/lib/openafs/local/NetInfo file if it exists,
or from the list of interfaces configured with the operating system otherwise. The File Server then removes from the list any addresses
that appear in the NetRestrict file, if it exists. The File Server records the resulting list in the /var/lib/openafs/local/sysid file and
registers the interfaces in the VLDB. The database server processes use a similar procedure when initializing, to determine which
interfaces to use for communication with the peer processes on other database machines in the cell.
The NetRestrict file is in ASCII format. One IP address appears on each line, in dotted decimal format. The order of the addresses is not
significant.
To display the File Server interface addresses registered in the VLDB, use the vos listaddrs command.
SEE ALSO
NetInfo(5), sysid(5), vldb.DB0(5), fileserver(8), fs_getclientaddrs(1) vos_listaddrs(1)
COPYRIGHT
IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
This documentation is covered by the IBM Public License Version 1.0. It was converted from HTML to POD by software written by Chas
Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.
OpenAFS 2012-03-26 NETRESTRICT(5)