The CPU instruction data provided here was obtained using a 9672-R55
system.
Two tables are provided:
- The first for record lengths that result in synchronous coupling
facility accesses (less than 4K)
- The second for record lengths that result in asynchronous coupling
facility accesses (greater than 4K).
Note that asynchronous requests take more CPU time to process.
The response times are also slightly longer than for synchronous requests.
CPU instructions per API call for record lengths less than 4 K are
as follows:
| API CALL |
CONTENTION |
LOCKING |
RECOVERABLE |
| READ |
11.8 |
11.8 |
11.8 |
| READ/UPDATE |
12.0 |
22.2 |
22.4 |
| REWRITE |
19.5 |
24.0 |
33.0 |
| WRITE |
8.0 |
8.0 |
13.0 |
| DELETE |
7.0 |
11.0 |
16.5 |
CPU instructions per API call for record lengths greater than
4 K are as follows:
| API CALL |
CONTENTION |
LOCKING |
RECOVERABLE |
| READ |
15.3 |
15.3 |
15.3 |
| READ/UPDATE |
15.0 |
25.7 |
25.9 |
| REWRITE |
23.0 |
27.5 |
36.5 |
| WRITE |
11.5 |
11.5 |
16.5 |
| DELETE |
10.5 |
14.5 |
20.0 |