Hi,
The cpu usage graph of my linux machine shows 80% but when i look at the top command its not more then 10%. Cn it be that 80% does not take under account that my machine has 8 cpu ?
Thanks
CPU usage not correct
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Re: CPU usage not correct
Exactly, 80 here means 80/800 -> 10%.fering wrote:Cn it be that 80% does not take under account that my machine has 8 cpu ?
One quick solution is to change the graph template to divide values by 8 before rendering.
If you choose this option, you have to:fering wrote:how can i add this devide option ? in function ? didnt see any option to devide ?
- create a new CDEF (console -> Graph Management -> CDEFs -> Add) which does this ' / 8 ' operation
- maybe duplicate the graph template you are currently using (maybe you need to preserve it for other servers)
- in the target graph template, for each graph item set the created CDEF
- if you duplicated the graph template: update the graph to use the new template.
- gandalf
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There are several approaches to ease this ask:
1. CDEF
mentioned above
Requires a CDEF and a Graph Template per "server layout" e.g. one for a 4 CPU machine, another one for a 8 CPU machine ...
2. Data Query
Verify, that you are able to query the target for the "number of CPUs"
Create a (SNMP|Script) Data Query and make the number a "<direction>input</direction>" element named nmbrCPU. Then you may use e.g. |query_nmbrCPU| in a single CDEF/Graph Template
(see 1st link of my sig for more help)
Support for this was added with cacti 087b
Reinhard
1. CDEF
mentioned above
Requires a CDEF and a Graph Template per "server layout" e.g. one for a 4 CPU machine, another one for a 8 CPU machine ...
2. Data Query
Verify, that you are able to query the target for the "number of CPUs"
Create a (SNMP|Script) Data Query and make the number a "<direction>input</direction>" element named nmbrCPU. Then you may use e.g. |query_nmbrCPU| in a single CDEF/Graph Template
(see 1st link of my sig for more help)
Support for this was added with cacti 087b
Reinhard
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- Posts: 24
- Joined: Thu Dec 11, 2008 10:42 am
gandalf wrote:
2. Data Query
Verify, that you are able to query the target for the "number of CPUs"
Create a (SNMP|Script) Data Query and make the number a "<direction>input</direction>" element named nmbrCPU. Then you may use e.g. |query_nmbrCPU| in a single CDEF/Graph Template
(see 1st link of my sig for more help)
Support for this was added with cacti 087b
Reinhard
That's very interesting ! Somebody has done a template like this ?
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