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Top Forums Shell Programming and Scripting Bash script to periodically monitor a process's memory usage Post 303045299 by nezabudka on Monday 16th of March 2020 02:49:12 AM
Old 03-16-2020
Hello and welcome
It's customary to help on this resource, that is, you solve a problem and you don't succeed or you're stuck on something and don't know how to continue. Therefore, if you have a desire to try to write such a script yourself, then everyone here will readily help you. In addition,
creation is much more interesting and useful. The script is quite ordinary and writing will take much less time than finding a ready-made solution. If you are ready to make an effort, it is useful to start by breaking the task down into stages.

First, launching the scheduled task. For this, I think 'crontab' will work well.

Second, getting value of consumption process memory. The 'ps' utility is well suited for this, which can take a command name with the option '-C' or the process id with '-p' option. Using the formatted '-o pmem=' output, you can get memory consumption in percentage terms. This value is of type float, but cutting off the decimal part will not be a problem.

And last, comparing the obtained value with a constant, we determine the need for restarting the process.

My regards
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wracct(1M)						  System Administration Commands						wracct(1M)

NAME
wracct - write extended accounting records for active processes and tasks SYNOPSIS
/usr/sbin/wracct -i id_list [-t record_type] {process | task} DESCRIPTION
The wracct utility allows the administrator to invoke the extended accounting system, if active, to write intermediate records representing the resource usage of a selected set of processes or tasks. For tasks, a record_type option is also supported, allowing the administrator to request the writing of: o an interval record, which reflects task usage since a previous interval record (or since task creation if there is no interval record), or o a partial record, which reflects usage since task creation. OPTIONS
The following options are supported: -i id_list Select the IDs of the tasks or processes to write records for. Specify id_list as a comma- or space-separated list of IDs, presented as a single argument. For some shells, this requires appropriate quoting of the argument. -t record_type Select type of record to write for the selected task or process. For tasks, record_type can be partial or interval. par- tial is the default type, and the only type available for process records. OPERANDS
The following operands are supported: process Treat the given ID as a process ID for the purposes of constructing and writing an extended accounting record. task Treat the given ID as a task ID for the purposes of constructing and writing an extended accounting record. EXAMPLES
Example 1 Writing a Partial Record Write a partial record for all active sendmail processes. # /usr/sbin/wracct -i "`pgrep sendmail`" process Example 2 Writing an Interval Record Write an interval record for the task with ID 182. # /usr/sbin/wracct -t interval -i 182 task EXIT STATUS
The following exit values are returned: 0 Successful completion. 1 An error occurred. 2 Invalid command line options were specified. 3 Pertinent components of extended accounting facility are not active. FILES
/var/adm/exacct/task /var/adm/exacct/proc Extended accounting data files. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ SEE ALSO
acctadm(1M), attributes(5) SunOS 5.11 13 July 2005 wracct(1M)
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