=head1 NAME fs_setcachesize - Sets the size of the disk cache =head1 SYNOPSIS =for html
B [B<-blocks> reset)>>] [B<-reset>] [B<-help>] B [B<-b> reset)>>] [B<-r>] [B<-h>] B [B<-b> reset)>>] [B<-r>] [B<-h>] B [B<-b> reset)>>] [B<-r>] [B<-h>] =for html
=head1 DESCRIPTION The B command changes the number of kilobyte blocks of local disk space available to the Cache Manager for its data cache, on machines that use a disk cache. The command is not operative on machines that use a memory cache. To return the cache size to the default value specified in the third field of the local F file, provide a value of C<0> to the B<-blocks> argument. To return the cache size to the value set when the machine was last rebooted, use the B<-reset> flag instead of the B<-blocks> argument. This is normally the amount specified in the F file, unless the B<-blocks> argument was included on the B command to override the B value. To display the current cache size and amount of cache in use, for both disk and memory caches, use the B command. =head1 CAUTIONS This command is not operative on machines using a memory cache, and results in an error message. To change memory cache size, edit the B file and reboot, or reboot and provide the B<-blocks> argument to the B command. On machines using a disk cache, do not set the cache size to exceed 85% to 90% of the actual disk space available for the cache directory. The cache implementation itself requires a small amount of space on the partition. =head1 OPTIONS =over 4 =item B<-blocks> > Specifies the amount of disk space available for the Cache Manager to devote to the cache. The size should be a positive integer followed by an optional suffix: C for kibibytes (1024 bytes, the default), C for mebibytes (1024 kibibytes), C for gibibytes (1024 mebibytes), and C for tebibytes (1024 gibibytes). Provide a value of C<0> to set cache size to the default specified in the F file. =item B<-reset> Returns the cache size to the value set when the machine was last booted. This agrees with the value in the F file unless the B<-blocks> argument was used on the B command. =item B<-help> Prints the online help for this command. All other valid options are ignored. =back =head1 EXAMPLES The following command sets the disk cache size to 25000 kilobyte blocks. % fs setcachesize -blocks 25000 Both of the following commands reset the disk cache size to the value in the F file, assuming that the B<-blocks> argument to the B command was not used. % fs setcachesize -blocks 0 % fs setcachesize -reset =head1 PRIVILEGE REQUIRED The issuer must be logged in as the local superuser root. =head1 SEE ALSO L, L, L =head1 COPYRIGHT IBM Corporation 2000. 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.