Cisco MCS-7825-H3-IPC1, Руководство по обслуживанию

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Cisco Unified Communications Manager Managed Services Guide
OL-22523-01
Chapter 8 Industry-Standard Management Information Base
HOST-RESOURCES-MIB
Frequently Asked Questions
Can the HOST-RESOURCES-MIB be used for process monitoring?
The HOST RESOURCES MIB retrieves the information about the processes running on the system in
hrSwRunTable, by monitoring all of the processes running in the system. However, to monitor only the
installed Cisco Application, use the SYSAPPL-MIB.
How is the memory usage values shown by RTMT mapped to the HOST-RESOURCES-MIB?
Table 8-5 lists the memory usage values.
Why do the disk space values shown by RTMT and the HOST-RESOURCES-MIB differ?
In general the df size will not match the used and available disk space data shown. This is because of
minfree percentage of reserved filesystem disk blocks. The minfree value for a Cisco Unified
Communication Manager in Releases 6.x and 7.0 systems is 1%. So there will be difference of 1%
between the disk space used value shown in RTMT and HOST-RESOURCES-MIB.
In RTMT, the disk space used value is shown from df reported values: [(Total Space - Available Space)
/Total Space] * 100 where the Total Space includes the minfree also. For the HOST-RESOURCES-MIB,
this is calculated by [hrStorageUsed/hrStorageSize] * 100 wherein the hrStorageSize does not include
the minfree.
Table 8-5 Memory Usage Values
Memory Usages RTMT Counter HOST-RESOURCES-MIB
SWAP memory Usage Memory\Used Swap Kbytes hrStorageUsed.2 (whose description is Virtual Memory)
Physical Memory Usage Memory\Used Kbytes hrStorageUsed.1(whose description is Physical RAM)
Total memory (ph
swap) usage Memory\Used VM Kbytes No equivalent. Basically need to add hrStorageUsed.2 and
hrStorageUsed.1
Since swap memory may not be used at all on lightly used
servers, HR Virtual Memory may return 0. To validate HR
VM is returning correctly, that value needs to be
compared against RTMT Memory\Used Swap KBytes.
The hrStorageUsed for physical memory shows the data in
terms of used - (b cache).
The hrStorageUsed for physical memory shows the data
in terms of used that is b cache.
The shared memory info that is exposed by the MIB is
HOST-RESOURCES-MIB::hrStorageDescr.10 =
STRING: /dev/shm. The virtual memory reported by
HOST-RESOURCES-MIB is what is considered as swap
memory by RTMT.
For HOST RESOURCES MIB, the following is used:
•
%Physical memory usage = (Physical RAM
hrStora /dev/shm hrStorageUsed) /
(Physical RAM hrStorageSize)
•
%VM used = (Physical RAM hrStora
/dev/shm hrStora Virtual Memory
hrStorageUsed) / (Physical RAM hrStora
Virtual Memory hrStorageSize)