HP 3PAR User's Guide Page 593

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0 473405 11790 0 0 0 0 0 0
1 483013 2158 0 0 0 0 0 0
Temporary and Page Credits
Node Node0 Node1 Node2 Node3 Node4 Node5 Node6 Node7
0 0 33411 --- --- --- --- --- ---
1 33482 0 --- --- --- --- --- ---
Page Statistics
---CfcDirty--- ------CfcMax------- ----DelAck----
Node FC FC15 NL SSD FC FC15 NL SSD FC FC15 NL SSD
0 15 0 17 0 19200 0 9600 0 11 0 13 0
1 16 0 18 0 19200 0 9600 0 12 0 14 0
Press the enter key to stop...
The columns in the example above are identified as follows:
Node. Node ID on the storage system.
Type. Read or Write.
Access. Number of Current and Total Read/Write I/Os.
Hits. Number of Read/Write I/Os in which data was already in cache.
Hit%. Hits divided accesses displayed in percentages.
Free. Number of cache pages without valid data on them.
Clean. Number of clean cache pages (valid data on page). A page is clean when data in
cache matches data on disk.
Write1. 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.
WriteN. Number of dirty pages that have been modified more than 1 time.
WrtSched. Number of pages scheduled to be written to disk.
Writing. Number of pages being currently written by the flusher to disk.
DcowPend. Number of pages waiting for delayed copy on write resolution.
DcowProc. Number of pages currently being processed for delayed copy on write resolution.
RecFlush. During node down, number of recovered pages currently being written by the
flusher to disk.
LockBlk. Number of pages being modified by host I/O that are temporarily blocked because
page is being written to disk by the flusher.
CfcDirty. Current number of dirty cluster memory pages in the system.
CfcMax. Maximum allowed number of dirty cluster memory pages in the system.
DelAck. Number of delayed acknowledgements to the host in order to throttle the host's IO
writes due to cache resource constraints.
NOTES
Patterns are specified as regular expressions.
Temporary and Page Credits refer to the number of credits being given by each node to other
nodes in the system. The credits plus pages (free, clean, scheduled and writing) should add
up to the total amount of memory in the node.
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