HFS Global Statistics screen
This screen is invoked from the CMFMON Primary Option Menu or by entering an HFSG command from any CMFMON Online screen.
COMMAND ===> SCROLL ===> CSR
SYSTEM ===> SJSC
CPU 57/ 53 UIC 2540 Paging 0 ES Mig Age N/A Time 15:11:09 Mode TOTAL
Duration: 14:58:48
-- Storage (MB) -- ---- File I/O --- -- Metadata I/O --
Limits In Use Count Rate Count Rate
Total Max 4,027 257 DASD 388,958 7.2125 50,513 0.9367
Fixed Min 0 0 Cache 1,434K 26.5918 9,753.9K 180.8688
Hit Ratio 78.66 % 99.48 %
---------------------------- Buffer Pool Statistics --------------------------
BUFFR DATA NO. OF NO. OF BYTES %FIX I/O I/O FIX I/O FIX I/O %FIX
SIZE SPACE BUFFERS PAGES (KB) PAGES COUNT RATE COUNT RATE I/O
_____ _____ _______ _______ _______ _____ _______ _______ _______ _______ _____
-------------------------------------------------------------------------------
1 1 8,310 8,310 33,240 0.0 144,719 2.6835 0 0 0
4 1 1,011 4,044 16,176 0.0 2,354 0.0437 0 0 0
16 1 499 7,984 31,936 0.0 3,856 0.0715 0 0 0
64 1 686 43,904 175,616 0.0 28,977 0.5373 0 0 0
************************* END OF BUFFER POOL STATISTICS ***********************
The following table lists the header; ID (used when specifying keywords); whether the column appears in Total mode, Delta mode, or both modes; and a brief description of each column in this screen.
Column header | Column ID | Mode | Description | |
|---|---|---|---|---|
Duration | NA | Total | displays the elapsed time since the OMVS address space was started | |
NA | Delta | displays the elapsed time between two consecutive pressings of the Enter key | ||
Storage (MB) | NA | These fields display the number of megabytes of storage used for all HFS file systems, as follows: | ||
Total Max Limits | NA | Both | maximum amount of storage available for buffer pools | |
Total Max In Use | NA | Both | amount of storage currently in use for buffer pools | |
Fixed Min Limits | NA | Both | minimum amount of fixed storage available for buffer pools | |
Fixed Min In Use | NA | Both | minimum amount of fixed storage currently in use for buffer pools | |
File I/O | NA | These fields display file activity, as follows: | ||
DASD Count | NA | Both | number of times the first page of a data file was found on DASD | |
DASD Rate | NA | Both | number of I/O operations on DASD per second | |
Cache Count | NA | Both | number of times the first page of a data file was found in cache | |
Cache Rate | NA | Both | number of I/O operations on cache per second | |
Hit Ratio | NA | Both | percentage of I/O requests serviced from the cache | |
Metadata I/O | NA | These fields display metadata activity, as follows: | ||
DASD Count | NA | Both | number of times the metadata for a file was found on DASD | |
DASD Rate | NA | Both | number of metadata I/O operations on DASD per second | |
Cache Count | NA | Both | number of times the metadata for a file was found in cache | |
Cache Rate | NA | Both | number of metadata I/O operations in cache per second | |
Hit Ratio | NA | Both | percentage of I/O requests serviced from the cache | |
Buffer Pool Statistics | NA | For each buffer pool, the following are displayed: | ||
DATA SPACE | POOLDSPC | Both | number of data spaces comprising the pool | |
NO. OF BUFFERS | POOLBUFS | Both | number of buffers in the pool | |
NO. OF PAGES | POOLPAGS | Both | size (in pages) of the pool | |
BYTES (KB) | POOLBYTS | Both | size (in kilobytes) of the pool | |
FIX PAGES | POOLFPCT | Both | percent of pages of the pool that are in fixed storage | |
I/O COUNT | IOTOTNUM | Both | number of buffers for which I/Os were issued | |
I/O RATE | IOTOTRAT | Both | number of I/O requests for buffers, per second | |
FIX I/O COUNT | IOFIXNUM | Both | number of fixed buffers for which I/Os were issued | |
FIX I/O RATE | IOFIXRAT | Both | number of I/O requests for fixed buffers, per second | |
%FIX I/O | IOFIXPCT | Both | percent of I/O requests serviced from fixed buffers | |