Follow Techotopia on Twitter

On-line Guides
All Guides
eBook Store
iOS / Android
Linux for Beginners
Office Productivity
Linux Installation
Linux Security
Linux Utilities
Linux Virtualization
Linux Kernel
System/Network Admin
Programming
Scripting Languages
Development Tools
Web Development
GUI Toolkits/Desktop
Databases
Mail Systems
openSolaris
Eclipse Documentation
Techotopia.com
Virtuatopia.com
Answertopia.com

How To Guides
Virtualization
General System Admin
Linux Security
Linux Filesystems
Web Servers
Graphics & Desktop
PC Hardware
Windows
Problem Solutions
Privacy Policy

  




 

 

ipcclean

Name

ipcclean -- remove shared memory and semaphores from a failed PostgreSQL server

Synopsis

ipcclean

Description

ipcclean removes all shared memory segments and semaphore sets owned by the current user. It is intended to be used for cleaning up after a crashed PostgreSQL server ( postmaster ). Note that immediately restarting the server will also clean up shared memory and semaphores, so this command is of little real utility.

Only the database administrator should execute this program as it can cause bizarre behavior (i.e., crashes) if run during multiuser execution. If this command is executed while a server is running, the shared memory and semaphores allocated by that server will be deleted, which would have rather severe consequences for that server.

Notes

This script is a hack, but in the many years since it was written, no one has come up with an equally effective and portable solution. Since the postmaster can now clean up by itself, it is unlikely that ipcclean will be improved upon in the future.

The script makes assumptions about the output format of the ipcs utility which may not be true across different operating systems. Therefore, it may not work on your particular OS. It's wise to look at the script before trying it.


 
 
  Published courtesy of The PostgreSQL Global Development Group Design by Interspire