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Full Discussion: AIX change ulimit for a user
Top Forums UNIX for Advanced & Expert Users AIX change ulimit for a user Post 303042603 by vbe on Wednesday 1st of January 2020 04:13:41 AM
Old 01-01-2020
Greetings and Happy New Year!

You can't judge like that what is good/bad...
Oracle is no ordinary user: many users access to files using oracle UID the same for processes etc
So it will depend on the size of your RDBMS or how many instances you have running on a server, how many processes are "oracle" etc the same for files and file size: no ordinary user would produce a file on a system the size of a full export (oracle)...
Why unlimited as value is not a good idea unless you know what you are doing AND what the others do:
Just an example: if a coder badly checked his new code that went in production ( or just a bug...) fall on a case you case have files opening but not closed correctly, worse though quite funny when it occurs: executing an infinite loop opening new processes...
You end with a freeze of the system where if lucky and an admin can connect will shutdown gracefully the box, more severe no one can connect and you have no other choice but to power off...
AIX at least lets you define on a specific user basis, may not be the case of all Unixes you see

Addendum:
Q: Do you have any issues? Giving a lot of resources will give you peace ( no errors or warning of running out of resources...) only that waste of resource will affect performance, if that is OK with you and production are happy, well why worry except for the case you do have an issue, it will be in proportion with what you gave

Last edited by vbe; 01-01-2020 at 05:29 AM.. Reason: Typos and addendum
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AUTOLOG(8)                                                    System Manager's Manual                                                   AUTOLOG(8)

NAME
autolog - Log out idle users SYNOPSIS
autolog [ options ] DESCRIPTION
The program reads the utmp file, entry by entry. The username for each 'user process' is compared to the entries in the configuration file (see autolog.conf(5) ). The first entry to match both the name, the group, and the tty line of the process will be used to conduct the automatic logout. CALL
/etc/init.d/autolog start or autolog to run this program in daemon-mode autolog -o to run this program as "ordinary" program. Keep in mind: Also when running as ordinary program, it will stay in memory until all its jobs are done. OPTIONS
-a (all processes) Print information on ALL utmp entries--not just user processes. -d (debug mode) This is helpful in setting up your configuration file. The program runs in foreground rather than forking and it prints out verbose messages about what it is doing. -n (nokill) Use this to prevent autolog from actually "killing" anyone. Use -d and -n together when setting up a new configuration file. ( This will not affect killing of lost processes. ) -o (ordinary) Use this to run this program as ordinary program, not as daemon. Program will end, when its job is done. In this case, some data is kept in "/var/lib/autolog/autolog.data". This is read, when the program is called again. -f config_file_name Use this to override the default: "/etc/autolog.conf" -l log_file_name Use this to override the default: "/var/log/autolog.log". Note that if this file doesn't exist, no logging will happen. Create the file (with touch) to enable logging. -t idle_time Use this to override the internal default idle time (minutes) -g grace_period Use this to override the internal default grace period (seconds) -m yes/no Use this to override the internal mailing switch. If "yes" the program will send mail to the users right after killing them. -c yes/no Use this to override the internal "pre-clear" switch. If "yes" the program will clear the terminal screen before warning the user. -w yes/no Do timeouts based on total session time--not idle time. (hard) -l yes/no If set to "yes" activities will be written to the logfile if present. AUTHOR
Kyle Bateman <kyle@actarg.com> (autolog 0.35), Carsten Juerges <juerges@cip-bau.uni-hannover.de> (autolog 0.40) This manual page was modified for Debian by Paul Telford <pxt@debian.org> Linux Administrative Utilities AUTOLOG(8)
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