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Full Discussion: Sleep command did not worked
Top Forums UNIX for Beginners Questions & Answers Sleep command did not worked Post 303002632 by Don Cragun on Tuesday 29th of August 2017 11:33:58 AM
Old 08-29-2017
What you have shown us is a script that writes a timestamp into a log file (which you haven't shown us), starts a process running in the background, sleeps for a second and exits. There is absolutely no indication that the sleep you have shown us should have any effect whatsoever on the behavior of this script.

What is producing the sample log fragments you did show us? Is it coming from appldata_proc.ksh? (It is not coming from the echo in the code you did show us!)

What does the log that you did show us have for several seconds before and after the three lines that show a timestamp of 10:45:12?

Note that there is no reason to believe that a script that is started every second will finish every second. On a busy system, several invocations of appldata_proc.ksh could be running at the same time even if one invocation of appldata_proc.ksh usually runs in much less than a second.
 

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serialize(1)						      General Commands Manual						      serialize(1)

NAME
serialize - force target process to run serially with other processes SYNOPSIS
command [command_args] pid] DESCRIPTION
The command is used to force the target process to run serially with other processes also marked by this command. The target process can be referred to by pid value, or it can be invoked directly on the command. Once a process has been marked by the process stays marked until process completion unless is reissued on the serialized process with the option. The option causes the pid specified with the option to return to normal timeshare scheduling algorithms. This call is used to improve process throughput, since process throughput usually increases for large processes when they are executed serially instead of allowing each program to run for only a short period of time. By running large processes one at a time, the system makes more efficient use of the CPU as well as system memory, since each process does not end up constantly faulting in its working set, to only have the pages stolen when another process starts running. As long as there is enough memory in the system, processes marked by behave no differently from other processes in the system. However, once memory becomes tight, processes marked by are run one at a time with the highest priority processes being run first. Each process will run for a finite interval of time before another serialized process is allowed to run. Options supports the following options: Indicates the process specified by pid should be returned to timeshare scheduling. Indicates the pid of the target process. If neither option is specified, is invoked on the command line passed in. RETURN VALUE
returns the following value: Successful completion. Invalid pid specification, nonnumeric entry, or pid specification is that of a special system process. Could not execute the specified command. No such process. Must be root or a member of a group having the privilege to execute ERRORS
fails under the following condition and sets (see errno(2)) to the following value: The pid passed in does not exist. EXAMPLES
Use to force a database application to run serially with other processes marked for serialization: Force a currently running process with a pid value of 215 to run serially with other processes marked for serialization: Return a process previously marked for serialization to normal timeshare scheduling. The pid of the target process for this example is WARNINGS
The user has no way of forcing an execution order on serialized processes. AUTHOR
was developed by HP. SEE ALSO
setprivgrp(1M), getprivgrp(2), serialize(2). serialize(1)
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