Performance measures

• For ISAM access to ISAM files in ARCHIVE (directory, checkpoint, report files), ARCHIVE uses the task-independent standard ISAM pool for data caching. The size of the standard ISAM pool can be set with the system parameter GLBDFPS, see “Introductory Guide to Systems” [3].
  Default value: 512 PAM pages (i.e. 1 Mbyte); this value should be increased in accordance with the size of the directory file. Recommended value: 8.192 PAM pages.

• The runtime of long ARCHIVE runs can be reduced using parallel runs on different devices, see DRIVES operand in the EXPORT and SAVE statements.