Add hardware.memory.buffer and hardware.memory.cached metrics¶
https://blueprints.launchpad.net/ceilometer/+spec/hardware-memory-buffer-and-cache-metrics
Add hardware.memory.buffer and hardware.memory.cached metrics to monitor the memory buffer size and memory cache size of a physical machine through SNMP.
Problem description¶
- Currently Ceilometer only support 4 memory oid of SNMP:
_memory_total_oid = “1.3.6.1.4.1.2021.4.5.0” _memory_avail_real_oid = “1.3.6.1.4.1.2021.4.6.0” _memory_total_swap_oid = “1.3.6.1.4.1.2021.4.3.0” _memory_avail_swap_oid = “1.3.6.1.4.1.2021.4.4.0”
But in practice, memory cache and buffer size are also very useful information to determine the status of a physical machine.
Proposed change¶
Add two metrics, hardware.memory.buffer and hardware.memory.cached, to monitor the memory buffer size and memory cache size of a physical machine.
To achieve this, we need add two SNMP oid and two hardware pollsters.
Firstly, add two oid in SNMP inspector:
_memory_buffer_oid = “1.3.6.1.4.1.2021.4.14.0” _memory_cached_oid = “1.3.6.1.4.1.2021.4.15.0”
Secondly, add two Hardware Pollsters in hardware.pollsters.memory:
MemoryBufferPollster
MemoryCachedPollster
Alternatives¶
None
Data model impact¶
None
REST API impact¶
None
Security impact¶
None
Pipeline impact¶
None
Other end user impact¶
None
Performance/Scalability Impacts¶
None
Other deployer impact¶
None
Developer impact¶
None
Implementation¶
Assignee(s)¶
- Primary assignee:
luogangyi
Work Items¶
Add two oid in SNMP inspector:
_memory_buffer_oid = “1.3.6.1.4.1.2021.4.14.0” _memory_cached_oid = “1.3.6.1.4.1.2021.4.15.0”
Add two Hardware Pollsters in hardware.pollsters.memory:
MemoryBufferPollster
MemoryCachedPollster
Future lifecycle¶
None
Dependencies¶
None
Testing¶
Need unit test
Documentation Impact¶
None
References¶
[1] oid references http://www.net-snmp.org/docs/mibs/ucdavis.html
