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Questions tagged [vmstat]

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1answer
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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
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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
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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
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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
283 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 (...
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1answer
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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
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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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0answers
463 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
210 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 ...
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0answers
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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 ...
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2answers
1k 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
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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
663 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 -----------...