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4 Posts
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133666
December 14th, 2010 02:00
VMware agent sample interval - recommendations?
Hi,
I see the default value for the agent is 120 seconds and the various PDF's reference this default setting as the preferred option. However, having a 120 second delay for all the stats that we see in vFog works against us for really important alerts like host failures.
I've run up our vFog agents with a sample interval of 60 seconds and it seems to run OK. Has anyone else modified this setting and what are your preferred values based on performance and stability? If you run at a lower sample interval, do you run the collector/connector agents on dedicated VMs or still load them on the vCenter servers?
thanks,
-Nickb
I see the default value for the agent is 120 seconds and the various PDF's reference this default setting as the preferred option. However, having a 120 second delay for all the stats that we see in vFog works against us for really important alerts like host failures.
I've run up our vFog agents with a sample interval of 60 seconds and it seems to run OK. Has anyone else modified this setting and what are your preferred values based on performance and stability? If you run at a lower sample interval, do you run the collector/connector agents on dedicated VMs or still load them on the vCenter servers?
thanks,
-Nickb
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lmurphy1
57 Posts
0
December 14th, 2010 21:00
The value of 120 seconds is used because that’s a safe value for a medium size environment where the performance collections and inventory collections do not collide.
For eg: 500 objects inventory collection is finished within 40-60 seconds (ONLY once when service starts) and depending upon how many VMs are turned on it can take 30-40 seconds more for the performance collections to finish.
If the environment is small 60 seconds sampling will definitely work too. Point is if you have 60 seconds sampling, we would be filling the DB twice faster.
Over time as you have more metrics getting collected and stored in DB your performance will be sluggish.
It all depends on individual preference, size of the environment and the purpose of this data collection. If the primary motive of data collection is to find host failures and one feels 60 seconds is acceptable, they can set this sample interval to 60.
HTH!
-Larry