12-29-2016
You have no CPU shortage at all, but the server is heavily misconfigured: it is one small step away from swapping to death. The high numbers in "fr" and "sr" are signs that memory is on the brink of being exhausted and the system is already scanning frantically for places which can be swapped out in case. The chock full blocked-queue and the wait% in the CPU section come from the system having to wait for I/O. This would be OK if the presented snapshot is from a backup cycle (where only I/O counts and the system is normally bound by that) but if this is the usual state of affairs the system would greatly profit from more I/O-capacity (like a better network connection, faster disks, etc. - where exactly the bottleneck in I/O is doesn't show up in the picture).
I don't know for sure but if this is an Oracle system you most probably have the SGA configured too big. Reduce it in size (or add memory, with the same effect) and add I/O capacity and you probably can take away ~3-4 processors without the performance being altered at all, perhaps even better.
You might want to read the
Performance Tuning Introduction i wrote for an in-depth explanation of what is going on in your system.
I hope this helps.
bakunin
Last edited by bakunin; 12-29-2016 at 11:53 AM..
These 2 Users Gave Thanks to bakunin For This Post:
9 More Discussions You Might Find Interesting
1. AIX
Hello everybody.
I have a problem with my AIX 5.3. Recently my unix shows a high cpu utilization with sar or topas.
I need to find what I have to do to solve this problem, in fact, I don't know what is my problem.
I had the same problem with another AIX 5.3 running the same... (2 Replies)
Discussion started by: wilder.mellotto
2 Replies
2. News, Links, Events and Announcements
About 4 years ago I wrote this tool inspired by Rob Urban's collect tool for DEC's Tru64 Unix. What makes this tool as different as collect was in its day is its ability to run at a low overhead and collect tons of stuff. I've expanded the general concept and even include data not available in... (0 Replies)
Discussion started by: MarkSeger
0 Replies
3. Solaris
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
4. Solaris
Hi All,
While creating zone we will mention min and max cpu cores, like
add dedicated-cpu
set ncpus=NUM_CPUS_MIN-NUM_CPUS_MAX
end
Ques1:
Suppose thing that non global zone uses only minimum cores at particular time What the other cores will do, Will it shared to global zone?
Ques:2... (1 Reply)
Discussion started by: vijaysachin
1 Replies
5. HP-UX
There might be some problem with my server,
because every morning at 7, it's performance become bad with no DB extra deadlock.
But I just couldn't figure it out.
Please give me some advise, thanks a lot...
According to the CPU performace chart, Daily CPU loading Maximum: 42 %, Average:36%.
... (8 Replies)
Discussion started by: GreenShery
8 Replies
6. SCO
hi
We have migrated SCO 5.0.6 into ESX4, but the VM eats 100% of the virtual CPU.
Here is top print from the SCO VM:
last pid: 16773; load averages: 1.68, 1.25, 0.98 02:08:41
79 processes: 75 sleeping, 2 running, 1 zombie, 1 onproc
CPU states: 0.0% idle, 17.0% user,... (7 Replies)
Discussion started by: ccc
7 Replies
7. HP-UX
We have a DB server which is constantly utilised above 95% above.
This is becoming nuisance when the monitoring team frequently calls to check on it. Frankly I do not know what to tweak or even interpret the outputs.
I noticed constant 30 to 60% in wio column of the cpu utilisation.
There... (1 Reply)
Discussion started by: sundar63
1 Replies
8. Shell Programming and Scripting
I want to write a shell script which will print AIX
CPU utilization
memory utilization
every 5 mins redirect to file. How do i do it? Please advise.
Which commands I should use? (3 Replies)
Discussion started by: vegasluxor
3 Replies
9. Solaris
Hi all,
Been reading a lot of the cpu load and its "analogy of it to car traffic path of expressway"
From wiki
Most UNIX systems count only processes in the running (on CPU) or runnable (waiting for CPU) states. However, Linux also includes processes in uninterruptible sleep states... (13 Replies)
Discussion started by: javanoob
13 Replies
LEARN ABOUT XFREE86
s390_sthyi
S390_STHYI(2) System Calls Manual S390_STHYI(2)
NAME
s390_sthyi - emulate STHYI instruction
SYNOPSIS
#include <asm/unistd.h>
int s390_sthyi(unsigned long function_code, void *resp_buffer,
uint64_t *return_code, unsigned long flags);
DESCRIPTION
The s390_sthyi() system call emulates the STHYI (Store Hypervisor Information) instruction. It provides hardware resource information for
the machine and its virtualization levels. This includes CPU type and capacity, as well as the machine model and other metrics.
The function_code argument indicates which function to perform. The following code(s) are supported:
0 Return CP (Central Processor) and IFL (Integrated Facility for Linux) capacity information.
The resp_buffer argument specifies the address of a response buffer. If the system call returns 0, the response buffer will be filled with
CPU capacity information. Otherwise, the response buffer's content is unchanged.
The return_code argument stores the return code of the STHYI instruction, using one of the following values:
0 Success.
4 Unsupported function code.
For further details about return_code, function_code, and resp_buffer, see the reference given in NOTES.
The flags argument is provided to allow for future extensions and currently must be set to 0.
RETURN VALUE
On success (that is: emulation succeeded), the return value of s390_sthyi() matches the condition code of the STHYI instructions, which is
a value in the range [0..3]. A return value of 0 indicates that CPU capacity information is stored in *resp_buffer. A return value of 3
indicates "unsupported function code" and the content of *resp_buffer is unchanged. The return values 1 and 2 are reserved.
On error, -1 is returned, and errno is set appropriately.
ERRORS
EFAULT The value specified in resp_buffer or return_code is not a valid address.
EINVAL The value specified in flags is nonzero.
ENOMEM Allocating memory for handling the CPU capacity information failed.
EOPNOTSUPP
The value specified in function_code is not valid.
VERSIONS
This system call is available since Linux 4.15.
CONFORMING TO
This Linux-specific system call is available only on the s390 architecture.
NOTES
Glibc does not provide a wrapper for this system call, use syscall(2) to call it.
For details of the STHYI instruction, see <https://www.ibm.com/support/knowledgecenter/SSB27U_6.3.0/com.ibm.zvm.v630.hcpb4/hcpb4sth.htm>.
SEE ALSO
syscall(2)
COLOPHON
This page is part of release 4.15 of the Linux man-pages project. A description of the project, information about reporting bugs, and the
latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.
Linux Programmer's Manual 2018-02-02 S390_STHYI(2)