HP 3PAR StoreServ 7000 Storage - Manual (Page 111)

Table 50 Node Cache Performance Report Metrics
Description Metric
Number of reads that hit in the cache. Read Hits
Number of reads that miss in the cache. Read Misses
Total number of reads. Not shown in charts. Read Total
Number of writes for which the page is already in cache AND is dirty (i.e., has previously written
data that has not yet been flushed to disk). Write Hits
Number of writes that miss in the cache. A write is considered a miss if the page is not in the
cache or if the page is not dirty in the cache (see above). Write Misses
Total number of writes. Not shown in charts. Write Total
Percentage of reads (out of total reads) that hit in the cache. Read Hit%
Percentage of write (out of total writes) that hit in the cache. Write Hit%
Total number of accesses (reads + writes). Not shown in charts. Total
Number of locked blocks. Lock Blocks
Free space for the cache. Free
Number of clean cache pages (valid data on page). Clean
Number of dirty pages that have been modified exactly 1 time. A page is dirty when it has been
modified in cache but not written to disk. Write1
Number of dirty pages that have been modified more than 1 time. WriteN
Number of pages scheduled to be written to disk. WriteScheduled
Number of pages being currently written by the flusher to disk. Writing
During node down, number of dead node pages recovered that have to be written to disk. Recov
CPU Performance Reports
Table 51 (page 111) describes the metrics that are shown for CPU Performance Reports.
Table 51 CPU Performance Report Metrics
Description Metric
Percent of CPU time in user-mode. User%
Percent of CPU time in system mode. Sys%
Percent of CPU time in idle. Idle%
Number of interrupts per second. Intr/s
Number of context switches per second. CtxtSw/s
Link Performance Reports
Table 52 (page 112) describes the metrics that are shown for Link Performance Reports.
Performance Reports 111