Questions tagged [vmstat]

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1answer
60 views

How to remove the average from vmstat?

In the man vmstat there is the following explanation about the first line: The first report produced gives averages since the last reboot. Additional reports give information on a sampling ...
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1answer
20 views

vmstat - Threads Waiting for Runtime vs Load Average?

I've read in a few places now that "load average" shown in top, uptime, and other places is based on the "average length of run queue". I'm looking at the first column in vmstat with the header r1 ...
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1answer
125 views

How do I determine amount of resources that Docker host needs to provision to a container, by inspecting a running system?

My goal is to define container definitions("ContainerDefinitions") with appropriate memory size needed in RAM to launch the docker container. For example, below code snippet for jenkins container(...
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2answers
389 views

what's the meaning of swpd in vmstat

I am using vmstat on my linux machine, and it shows ➜ ~ vmstat ...
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1answer
32 views

“One-shot” swapping activity monitoring

I am trying to monitor the swapping activity in a Linux Server in the last, say, 1, 5 or 15 minutes. One way is to run vmstat and keep watching si and so counters during these intervals. However how ...
2
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1answer
790 views

IO wait time is higher than disk utilization. Isn't this impossible? [duplicate]

I am trying to improve my understanding, following this (so far) unanswered question: Possible limiting factor during upgrade of Fedora VM - not disk or cpu or network? I ran the following test load, ...
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4answers
606 views

Match the column heading and print the values of the column using awk

How to print column free using awk or sed command? Depends on vmstat version column, free may change from column number 5 to something else. bash-3.00$ vmstat 1 1|tail -2 r b w swap free re mf pi po ...
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1answer
69 views

CPU section in vmstat

The man page for vmstat states, for example for wa section, " time spent waiting for IO" but what is the unit of time? Is it in seconds?
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0answers
906 views

vmstat: Very high interrupts (system.in) & context switches (system.cs)

My desktop PC has been quite sluggish lately, especially after I leave it overnight and then start using it again the next morning. I've tried decreasing swappiness (current value is 5) and the disk ...
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1answer
758 views

How to understand the IO output from vmstat?

I use vmstat to get IO stats from ubuntu linux. Below is the description of this command: IO bi: Blocks received from a block device (blocks/s). bo: Blocks sent to a block device (...
0
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1answer
645 views

vmstat doesn't return the correct value on the first time run

I am using vmstat on ubuntu linux to get cpu usage. My current cpu is very busy at almost 100%. If I run vmstat like below: $ vmstat procs -----------memory---------- ---swap-- -----io---- -...
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1answer
69 views

Why swpd is above 0 but si & so = 0 all the time

I've been monitoring my Centos with vmstat 1 $ cat /etc/centos-release CentOS Linux release 7.3.1611 (Core) Here is the output: So why swpd is above 0 but si & so = 0 all the time Could someone ...
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1answer
849 views

System Usage 80% and User CPU usage 20%

Company purchased HP Gen 9 Server to be used for Oracle Applications. Today while doing daily system check Top show that System Area CPU Usage is 80%(Certainly not normal)while User Area Usage is 17-...
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1answer
339 views

What does the “buff” column represents in vmstat output?

I am trying to ascertain the meaning of buff column in vmstat output. The manpage says that it represents the amount of memory used as buffers. Which buffers are being talked about here? I ran an ...
3
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0answers
81 views

Does ZFS reads and writes show up in vmstat -p output

I am aware of ZFS not using the regular file system cache for caching pages for reads or writes (ZFS uses ARC and ZILs). My question is would "vmstat -p" on a recent Solaris machine also reflect read ...
3
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2answers
2k views

How to insert vmstat output to a file maintaining only the latest entry always

I want to insert vmstat output to a file in every 10 seconds. I use the following command to do it. vmstat 10 > vmstatfile.txt This will create a file named vmstatfile.txt and appends to it, on ...
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0answers
351 views

what does vmstat “r” mean?

I'm recently started studying RHEL. But I'm not sure, what does vmstat column "r" mean? does it include kernel and user thread? or only kernel thread? does vmstat command read /proc/stat or traversal ...
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2answers
1k views

Reset vmstat statistics without rebooting

Running vmstat will give you the average virtual memory usage since last reboot. The si and so values give the average virtual memory I/O. For example: root@mymachine# vmstat procs -----------...