There are over 100 rules processed against the system, users, DASD, Linux servers and network, and more rules are being added as more situations are diagnosed. If the zTUNE rules do not identify your problem immediatly, Call the Velocity Software performance experts and we will identify the problem to the best of our ability.
Storage Problems?
For example, if there were storage problems, this is a sample of an installation short on storage. Some users could be protected using the SET RESERVED command.
01:00:00 *** Interval analysis ***
*****zTUNE Evaluation *************
STR5 5.47 deferred tasks are waiting for storage.
Storage available is insufficient.
USR2 User ESAWRITE is paging excessively (12.3 per second)
This user can be protected using SET RESERVED
USR2 User LINUX120 is paging excessively (13.5 per second)
This user can be protected using SET RESERVED
USR2 User LINUX160 is paging excessively (96.2 per second)
This user can be protected using SET RESERVED
USR2 User LINUX161 is paging excessively (37.7 per second)
This user can be protected using SET RESERVED
Processor Problems?
In this example, two processes on Linux are using almost a full processor. The linux server using the CPU is identified, how to control it's resource is shown, and there are two heavy java processes on the identified server.
*****zTUNE Evaluation *************
LNH0 Node LINUX161 has 100 percent processor utilization
Control node using SET SHARE command as in:
SET SHARE LINUX161 ABS 50% LIMITSOFT
This will reduce impact on other servers.
LNX3 Node LINUX161 has process java using 58 percent cpu.
LNX3 Node LINUX161 has process java using 29 percent cpu.
Many other Problems?
In this example, it shows that spool is nearly full. When spool fills, CP will stop spooling consoles or accepting other spool files. The other problem is common for new installations with Linux, where linux servers are held on z/VM's Eligble list - and not allowed to be dispatched. There is a very easy solution to this problem.
*****zTUNE Evaluation *************
SPL5 Spool utilization is 86.2% full.
Perform Spool file analysis and purge large
spool files, or force users currently writing
excessively to spool.
SRM2 There are 0.216 users on the Eligible list.
This has the impact of increasing response time
and decreasing CPU. The eligible list is most
likely a result of a low STORBUF.
Recommendation: Increase Storbuf to 300 300 300
