Jerry Feldman wrote:

#!/bin/bash while [ 1 ] do # do whatever task you want to do sleep 15 # sleep for 15 seconds done

I know you know this Jerry, but I still have to point this out: this won't run every 15 seconds, it will run at 15 second intervals. To get something run every 15 seconds, you have to do something like a C program with a timer giving a SIGALRM every 15 seconds, and set whatever it is you want to do as a signal handler. And if the 15 second thing is a strict requirement, you also have to run it as a realtime process

On Thursday 23 February 2006 13:17, Anders Johansson wrote:

Anders Johansson wrote:

...

I know you know this Jerry, but I still have to point this out: this won't run every 15 seconds, it will run at 15 second intervals.

Silly me. Of course the "whatever task" could be launched in the background, which would bring it closer to "every 15 seconds", which might be good enough

But perhaps the way Jerry wrote it would be best.... Since it would allow the program to finish each time. Or... if it is observed that the program takes 3 seconds to run (as an average) then the sleep time could be reduced to 12 secs. and thus if the job took 5 secs. on occasion, no harm would be done. At least that's the way I would do it (not knowing what the OP wants to accomplish)

Ok i understad, and running this script is a good idea? #!/bin/bash while [ 1 ] do jobyouwanttorun& #Run this asynchronously sleep 15 # sleep for 15 seconds done the thing is that i have a oracle rac that run a job every 5 seconds, but because of a bug in oracle the jobs have a memory leak, so we tried with control-m but it can only run every 2 minutes wich is not enough, thats why we were thinking of runing the jon in the crontab, but i didnt know it has a 1 minute interval. the job can take from less than 1 second to finish to 45 seconds. Thnx all On 23/02/06, Jerry Feldman wrote:

On Thursday 23 February 2006 2:41 pm, Bruce Marshall wrote:

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On Thursday 23 February 2006 13:17, Anders Johansson wrote:

...

Anders Johansson wrote:

...

I know you know this Jerry, but I still have to point this out: this won't run every 15 seconds, it will run at 15 second intervals.

Silly me. Of course the "whatever task" could be launched in the background, which would bring it closer to "every 15 seconds", which might be good enough

But perhaps the way Jerry wrote it would be best.... Since it would allow the program to finish each time.

Or... if it is observed that the program takes 3 seconds to run (as an average) then the sleep time could be reduced to 12 secs. and thus if the job took 5 secs. on occasion, no harm would be done.

At least that's the way I would do it (not knowing what the OP wants to accomplish) In the scriptlet that I posted, the task itself could be spun off asynchronously: #!/bin/bash while [ 1 ] do jobyouwanttorun& #Run this asynchronously sleep 15 # sleep for 15 seconds done What this will do is to start your task once every 15 seconds regardless of how long the task takes to run. -- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

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