Logical Drive Status; Logical Drive Inventory; Memory; Memory Status - HP Xw460c - ProLiant - Blade Workstation User Manual

Logical Drive Status

Reads/Sec—The number of reads from this logical drive each second
Writes/Sec—The number of writes to this logical drive each second
Read MBytes/Sec—The number of megabytes read from the logical drive each second
Write MBytes/Sec—The number of megabytes written to the logical drive each second
Millisec/Read—The average time for each read to complete
Millisec/Write—The average time for each write to complete
Queue Length—The average number of concurrent requests between the server and this logical drive,
including transfers currently being serviced and transfers waiting for service, regardless of where the
request is waiting (disk or controller)

Logical Drive Inventory

Logical Drive Configuration
The controller on which the logical drive is defined
The array label (such as A, B, or C) as shown by the Array Configuration Utility (ACU)
The logical drive number as assigned by the ACU and the physical disk mapping
Logical drive size in megabytes
The RAID level for this logical drive
The logical drive striping factor
Whether caching is enabled for this logical drive

Memory

The following information is provided for memory.

Memory Status

Available MBytes—The amount of memory that is not currently allocated to any process or is unused.
A low Available MBytes value can indicate memory allocation bottlenecks.
Page Reads/Sec—The number of times the disk was read to retrieve pages of virtual memory necessary
to resolve page faults each second. Multiple pages can be read during a single disk read operation.
Pages Input/Sec—The number of pages read from the disk to resolve memory references to pages that
were not in memory at the time of the reference. This counter includes paging traffic on behalf of the
system cache to access file data for applications. It is important to observe this counter if you are
concerned about excessive memory usage, or thrashing, and the excessive paging that can result.
Page Faults/Sec—The average number of page faults each second. A page fault occurs when a process
refers to a virtual memory page that is not in its working set in main memory. A page fault does not
cause the page to be fetched from disk if that page is on the standby list and is already in main memory
or if it is in use by another process with which the page is shared. There are two types of page faults:
Hard Page Fault—The most expensive in terms of system resource usage, occurring when a missing
page must be retrieved from the disk
Soft Page Fault—Generally not considered a source of memory bottlenecks, occurring when the
missing page is not in the current working set but is located elsewhere in memory and easily
brought into the working set
Hard Page Faults %—The ratio of page faults per second to pages input per second. This value is a
primary indication of memory bottlenecks.
Memory performance is determined primarily by the rate at which memory is swapped out to disk. Page
Reads/Sec is the primary factor in determining memory performance issues, but the Hard Page Faults %
and Available MBytes are also considered.
Memory 157