HP-UX Encrypted Volume and File System Performance and Tuning

64k Block Random Read - 100mb File Size
2%
4%
6% 6% 6%
4%
13%
19%
25%
24%
1 10 25 50 100
IOZone Threads
CPU Utilization %
Throughput KBs -
Scale1
Clear CPU EVFS CPU Clear Random Read EVFS Random Read
Figure 24: Random Reads VxFS Tuning 5% dbc_max
For read-oriented applications, significantly reduced memory utilization can achieve the same results
as with a larger memory configuration.
When the same buffer cache sizing is used for the read test, except that the buffer cache is populated
with the read data prior to the test, the results improve significantly, despite the low cache limit.
64k Block Cached - 100mb File Size
1%
5%
10%
21%
39%
1%
6%
15%
23%
38%
1 10 25 50 100
IOZone Threads
CPU Utilization %
Throughput KBs -
Scale30
Clear CPU EVFS CPU Clear Reads EVFS reads
Figure 25: Cached Reads VxFS Tuning Buffer Cache 5%