HP 3PAR StoreServ 7200 2-node HP 3PAR System Reporter 3.1.0 Software User& - Page 111

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