cpu-shares vs cpu-cap in solaris

Thread Tools Search this Thread
Operating Systems Solaris cpu-shares vs cpu-cap in solaris
# 1  
Old 10-07-2009
cpu-shares vs cpu-cap in solaris

Can anyone tell me difference between cpu-shares vs cpu-cap in solaris & how FSS will work with cpu-caps ?
# 2  
Old 10-07-2009
I think you should take a look hereCPU Caps PSARC case draft at OpenSolaris.org

It describes what is caps, shares and their relationship to Fair Scheduling
# 3  
Old 10-07-2009
i checked that but i was not able to make is it beneficial to use FSS with cpu-caps or not
# 4  
Old 10-07-2009
It makes sense capping a zone CPU usage and use the FSS to balance usage between projects inside that zone.
# 5  
Old 10-07-2009
But does it make sense to use projects.cpu-cap just on a system without zones ?
# 6  
Old 10-07-2009
Why won't it ? These settings serve slightly different purposes.
# 7  
Old 10-08-2009
Ok agreed but if there are 2 projects on a system and every project has following cpu-cap

project1 --> 3300 ~ 33vcpus
project2 --> 1400 ~ 14vcpus

And system has total of 96 vcpus and this way only 48vcpus will be used.
And the system has pools and FSS too configured so my question is if the projects will hit their limits will the they use the rest of 48 vcpus with FSS and if yes how ?
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Why Entitlement CPU can't be set to same as Virtual CPU?

I read that Entitlement CPU should be set to max 75% compare to Virtual CPU. May I know the reason. I have set the Entitlement CPU = Virtual CPU on AIX . It works fine . Can you help to understand. (1 Reply)
Discussion started by: gabhanes
1 Replies

2. Solaris

Can't disable CPU in Solaris

hello all i have an issue about a solaris V440 cpu, im logged in the Ok prompt i can't disable a CPU3, i can't see it in dev list, i see only the cpu3-bank0 to cpu-bank4 please help me to disable it thank youuu (3 Replies)
Discussion started by: walidadam
3 Replies

3. AIX

Entitled CPU lesser Than Used CPU !!

Hi All, It may be a n00b question, but i really want to know , How Entitled Capacity is less and Used CPU is more when there is no Free CPU is available in the managed system. I have 5LPARs in a MS with Dual VIO. Managed System CPU details Available: 0.20 Assigned to partitions: 15.80... (11 Replies)
Discussion started by: Thala
11 Replies

4. UNIX for Dummies Questions & Answers

Is it possible to combine multiple CPU to act as a single CPU on the same server?

We have a single threaded application which is restricted by CPU usage even though there are multiple CPUs on the server, hence leading to significant performance issues. Is it possible to merge / combine multiple CPUs at OS level so it appear as a single CPU for the application? (6 Replies)
Discussion started by: Dissa
6 Replies

5. Solaris

Solaris 10 - capping CPU

Hi all I've purchased a T3-1 server. The T3-1 has a 16 core CPU. I want to create a zone to install an Oracle DB server in. Due to Oracle licensing issues I want to limit the zone to 8 cores. I've done some research and it seems there are 2 ways of setting a CPU core limit for a zone. 1. ... (0 Replies)
Discussion started by: soliberus
0 Replies

6. Solaris

offline CPU Solaris 10.

Hi, I need to offline one of the CPUs in my M4000. I'm going to use the psradm command to offline the CPU. Do I need to do anything before offlining the CPU like unbinding processes etc? The servers are running oracle databases which I will shutdown beforehand.:confused: Thanks,... (0 Replies)
Discussion started by: sparcman
0 Replies

7. Solaris

Difference between CPU CHIP and CPU ID

Hi All, What is the difference between CPU CHIP and CUP ID on SUN/ Oracle M5000 servers.. Thanks in advance (3 Replies)
Discussion started by: kumarmani
3 Replies

8. Solaris

Multi CPU Solaris system shows 100% CPU usage.

Hello Friends, On one of my Solaris 10 box, CPU usage shows 100% using "sar", "vmstat". However, it has 4 CPUs and prstat and glance are not showing enough processes to justify high CPU utilization. ========================================================================= $ prstat -a ... (4 Replies)
Discussion started by: mahive
4 Replies

9. UNIX for Dummies Questions & Answers

how to get persistant cpu utilization values per process per cpu in linux (! top,ps)

hi, i want to know cpu utilizatiion per process per cpu..for single processor also if multicore in linux ..to use these values in shell script to kill processes exceeding cpu utilization.ps (pcpu) command does not give exact values..top does not give persistant values..psstat,vmstat..does njot... (3 Replies)
Discussion started by: pankajd
3 Replies

10. Solaris

How to down a particular CPU in a server, witch is having 16 CPU's

Hi.., my dout is a solaris server is having 16 cpu's. in tht one cpu running some error process, accupaying more space. I wanna down tht particular CPU only with out interrupting the other 15 CPU's. how can i do this. is there any command for this ?? (5 Replies)
Discussion started by: b.janardhanguru
5 Replies
Login or Register to Ask a Question