Guardian Performance Analyzer (GPA) User Guide
Guardian Performance Analyzer (GPA) User Guide – (544541-006) Page 49 of 131
Global Performance Indicators
In this subsection of the report (Example 3-3), GPA provides an overall evaluation of the
system‟s performance based on the GPA analysis criteria. For the node in the
example, the GPA analysis has found the following conditions:
Example 3-3. Global Performance Indicators
III. GLOBAL PERFORMANCE INDICATORS
1
EXCESSIVE DISPATCHING : NO
2
INDEX LEVELS > 2 : NO
3
PROCESSOR LOAD BALANCE : POOR
4
OVER UTILIZED DISK : NO
5
OVER UTILIZED NODE : NO
6
CACHE FAULT DETECTED : NO
7
OVER UTILIZED CPU : NO
8
TRANSIENT PROCESSING : NO
9
DISK VOLUME QUEUING : YES
10
BLOCKED REQUESTS : NO
11
AVERAGE CACHE HIT % : 83.20%
12
TOTAL CACHE CALL RATE: 25.00 /SEC
(1)
EXCESSIVE DISPATCHING: No excessive dispatching. A dispatch
occurs each time CPU cycles are allocated to a process. The
acceptable value for this parameter depends on the CPU type.
(2)
INDEX LEVELS > 2: No index levels greater than 2. Each index level in
a key-sequenced file can cause an additional physical I/O operation
and/or additional CPU cycles. Keeping the number of index levels at
a minimum (no more than 2) reduces the number of physical I/O
operations and/or CPU cycles required for each logical I/O operation
on the file.
(3)
PROCESSOR LOAD BALANCE: Poor processor load balance. Referring
to Example 3-1 shows that the node has two CPUs that are out of
balance.
(4)
OVER UTILIZED DISK: No over utilized disk process. None of the
percentage busy times for the disk processes on the node is
excessive.
(5)
OVER UTILIZED NODE: No over utilization of the node. The percentage
utilization of the node is below the maximum recommended level
(refer to Example 3-1).
(6)
CACHE FAULT DETECTED: No cache faults detected. A cache fault
occurs when a disk process expects to find a data block in cache and
discovers that the memory manager has removed it. The memory
manager does this whenever it needs the extra storage space to
relieve a shortage of main memory.