HP-UX Encrypted Volume and File System Performance and Tuning

7
Figure 6 - System Memory After EVFS I/O Copy
This test indicates that EVFS will maximize memory utilization for the pseudo-driver process at 500MB
- 7.1GB – 6.6GB = 500MB - on this system (see the Testing Methodology chapter for full system
configuration details). 500MB is not an excessive amount of memory – proving that EVFS by itself
does not require massive memory upgrades. Additionally, since EVFS does not utilize buffer cache,
increasing memory for buffer cache utilization will not have a direct performance benefit for EVFS.
However, introducing latency into the write path of data can cause increased buffer cache utilization,
so an application that is writing to an EVFS-configured volume could potentially benefit from an
increase in buffer cache and associated memory footprint.