Performance Tuning “uptime” command in Linux

Posted: September 7, 2013 in Performance Tune, uptime

uptime command in Linux 

System Time:

This displays the time the system clock shows in 24 hour format:

System Uptime:

This shows you how long the system has been running for.  It will state “up” and then give a timeframe.  In this example picture the system has been running for 5 Hours 21 Minutes.  The time will keep track of hours and minutes.  Once a 24 hour period has past will then keep track of uptime by the number of days, hours and minutes.  Whenever a server is rebooted this timer is reset back to zero.

Number of Users Logged In:

This statistic shows you how many active users are logged into your system at a time.  Pending on the function of the system and if multiple people access it, it’s common to see more than just 1 user.

Load Average:

The load average is the actual usage being put on the server.  This number is signified anywhere from 0.0 up through whole numbers.  Each decimal point can be calculated to a percentage (ie. .01 equals 1% load average). The 3 numbers correspond with the load average for a given time frame during a 1 minute, 5 minute and 15 minute interval.  The lower the load average the better your system will perform.

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