|
|
|
|
|
|
Cache Dirty Pages Percentage
|
Percentage of dirty pages currently in cache, that is, pages that have been modified in the SP’s write cache, but that have not yet been written to disk. A high percentage of dirty pages means the cache is handling many write requests.
Note: This attribute is not available on Symmetrix Vmax devices.
|
Percentage (%)
|
None
|
Statistics
|
Cache Hit Ratio
|
Percentage of requests that are successfully served by a cache.
Note: This attribute is not available on CLARiiON devices.
|
Percentage (%)
|
None
|
Statistics
|
Operation Rate*
|
Total number of operations per second.
|
Operations/s
|
None
|
Statistics
|
Present
|
Indicates whether the device is present or not since the last collect.
|
{0 = No; 1 = Yes}
|
Warning = 0
|
Availability
|
Processor Utilization*
|
Utilization of the processor.
Note: This attribute is not available on CLARiiON devices.
|
Percentage (%)
|
Warning = 80 % (for two consecutive collects)
Alarm = 90 %
|
Statistics
|
Read Operation Rate
|
Number of read operations per second.
|
Operations/s
|
None
|
Statistics
|
Read Operation Percentage
|
Percentage of read operations.
|
Percentage (%)
|
None
|
Statistics
|
Response Time 
|
Average response time for all operations.
Note: A number of 10 (or less) collected I/Os between two data collects being insufficient to accurately report on response time, EMC Storage Monitoring may automatically sets this attribute to 0 to avoid triggering irrelevant alarms.
Note: This attribute is not available on Symmetrix Vmax devices.
|
Milliseconds (ms)
|
Warning = 10 ms (two consecutive times)
Alarm = 100 ms
|
Response Time
|
Status
|
Status of the controller.
|
{0=OK; 1 = Degraded; 2 = Failed}
|
Warning = 1
Alarm = 2
|
Availability
|
Transfer Byte Rate*
|
Count of data transferred per second.
|
Megabytes per second (MB/s)
|
None
|
Statistics
|
Write Flush Byte Rate
|
Cumulative count of write cache flushed per second.
Note: This attribute is not available on Symmetrix Vmax devices.
|
Megabytes per second (MB/s)
|
None
|
Statistics
|
Write Operation Rate
|
Number of write operations per second.
|
operations/s
|
None
|
Statistics
|
Write Operations Percentage
|
Percentage of written operations.
|
Percentage (%)
|
None
|
Statistics
|
