Historical Statistics

Check Enable Collection of Historical Statistics Facility (HSF) Records to enable the collection of historical statistics for this server.

Write to disk

Enables writing of HSF records to comma-separated files. These are called cashsf-a.csv and cashsf-b.csv, and are written to the system directory. Only one file is written to at any one time - this is called the active file. You write to the active file until the active file reaches the maximum size, at which point the alternate file becomes active. If the alternate file already exists it will be backed up with the name cashsf.nnn where nnn is the number of the backup. When you start an enterprise server, cashsf-a.csv is always set as the active file, and if it already exists it is backed up. Backup extensions are numbered from .001 up to .999. When a backup with extension .999 exists then the next backup will be created as cashsf.001. If cashsf.001 already exists then it will be overwritten.

Maximum HSF file size

If you have checked Write to disk, this is the size in kilobytes the .csv file will reach before Enterprise Server switches to the alternate .csv file. A value 0 selects the maximum size possible (4 Gb).

Create JCL file records

This switches on the generation of JCL file (JCLF) records for 'mainframe' files. That is, those that are accessed with FCDCAT and ASSIGN(EXTERNAL). JCLF records are local to a step, so that multiple records can be generated for a single data set name in the same job, one record is created for each step in which the data set is accessed.

Number of Records Displayed for Monitoring

Specifies the number of HSF records that Enterprise Server will hold in memory. When this number is reached, older records will be deleted when a new one is created. Records older than one hour are deleted too. The minimum value is 0, the maximum is 4096.