SLEEP command performance

Shell Programming and Scripting
1

Hi,

I wanted to run a particlar script for every 20 minutes. I dont have crontab in my server. Hence i ran this script in a loop by providing the command sleep 1200

Now i wanted to know is there any performance issue if this job keeps on execute in the server.

Thanks,
Puni

2

No, the performance impact will be small.

One point to note: assume

  1. when your code hits the 20 minute mark it executes correctly and it take about 5 seconds to complete successfully.

  2. This means your code goes back to sleep 5 seconds later every time it runs.

Eventually the sleep interval will not wake up during the 60 seconds that == 20 minutes elapsed. And it will stay that way since it never hits the 5 second time slippage. You need to rethink your design. maybe sleep 19 minutes 55 seconds.