linux_wiki:produce_and_deliver_reports_on_system_utilization_processor_memory_disk_and_network [Owlbear Consulting

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====== Produce And Deliver Reports On System Utilization Processor Memory Disk And Network ======

**General Information**

System utilization reporting.

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====== Lab Setup ======

The following virtual machines will be used:
  * server1.example.com (192.168.1.150) -> Configure and test system reporting

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====== Help ======

Finding help in this section.
  * standard man pages<code bash>man dstat
man sar
man sadf</code>

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====== Dstat ======

Dstat is good for real time monitoring and reporting.

\\
Install
<code bash>
yum install dstat
</code>

\\
Running dstat with default options
<code bash>
dstat
</code>
  * Defaults: -cdngy
    * c -> cpu
    * d -> disk
    * n -> network
    * g -> page stats
    * y -> system stats (interrupts, context switches)

\\
Write stats to a file/report
<code bash>
dstat -tcdm --output system-stats.csv
</code>
  * t -> time
  * c -> cpu
  * d -> disk
  * m -> memory

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====== Sysstat ======

Sysstat runs periodically and provides historical statistics.

[[linux_wiki:sar|See here for more sar commands.]]

\\
Install
<code bash>
yum install sysstat
</code>

\\
Sysstat config file
  * /etc/sysconfig/sysstat
    * Configure history, compression, and compression program

\\
Cron jobs
  * /etc/cron.d/sysstat
    * sa1 -> System activity every 10 mins by default
    * sa2 -> Daily summary

\\
System activity log files
  * /var/log/sa/
    * sa## -> Number is the day of the month

\\
View info now from a system activity file
<code bash>
sar -urd -f /var/log/sa/sa01
</code>

\\
Semi Colon Separated: Print data from a system activity file, redirect to a file to view later
<code bash>
sadf -d /var/log/sa/sa01 -- -urd -n DEV > system-stats.txt
</code>
  * -d -> Print contents of the data file in an easy to ingest by database format (semi colon separated)
  * -- -> sar options will follow
  * -u -> sar option: CPU usage
  * -r -> sar option: Memory usage
  * d -> sar option: Disk usage (d)
  * -n DEV -> sar option: Network stats from devices

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