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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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sys-suspend(1)							   User Commands						    sys-suspend(1)

NAME
sys-suspend - suspend or shutdown the system and power off SYNOPSIS
/usr/bin/sys-suspend [-fnxh][-d displayname] DESCRIPTION
sys-suspend provides options to suspend or shutdown the whole system. A system can be suspended to conserve power or to prepare the system for transport. The suspend should not be used when performing any hardware reconfiguration or replacement. In case of suspend, the current system state is preserved either by keeping memory powered (Suspend to RAM), or by saving the state to non- volatile storage (Suspend to Disk) until a resume operation is performed by power on or a wake-up event. On a resume in the windows environment, the system brings up lockscreen to ensure that only the authorized person has access to the system. In a non-windows environment, the user is prompted for password. It is possible that when devices or processes are performing critical or time sensitive operations (such as real time operations) the sys- tem fails to suspend. When this occurs, the system remains in its current running state. Messages reporting the failure are displayed on the console or system log. Once the system is successfully suspended, the resume operation always succeed barring external influences such as hardware reconfiguration or the like. In case of shutdown, the system responds as if poweroff(1M) was performed. This command enforces the solaris.system.power.suspend. authorizations. On a default install these are associated with the console user. Other users need to include these authorizations or include the Suspend profile. OPTIONS
The following operands are supported: -d displayname Connect to the X server specified by displayname. -f Force suspend. Causes a poweroff(1M) to occur if the suspend fails. System state are not be saved, and a normal boot follows. -h Change the default from suspend to shutdown. -n Do not display messages or request user intervention. -x Disable lockscreen. This flag disables the execution of lockscreen at resume time. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWpmowu | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
halt(1M), powerd(1M), poweroff(1M), shutdown(1M), attributes(5), cpr(7) SunOS 5.11 10 Mar 2009 sys-suspend(1)
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