Memory bottlenecks are evidenced by two different things happening on the system — paging and swapping. Paging refers to pages of memory being reclaimed by the page daemon when the system starts to get low on free memory. Swapping is more extreme, and refers to...
netstat is a powerful tool which helps to resolve variety of networking problems …
Blog for Unix Admin / Solaris Admin / Solaris Performance Monitoring
by Ramdev · Published June 12, 2021
The vmstat command is a useful tool to get a general overview of system performance and to triage for performance issues. Performance bottlenecks fall into four major categories: CPU, disk I/O’s, memory, and network I/O’s. The vmstat can help to find problems within the first three...
Generally a problem is identified when an application is not performing as expected. The above is a very general statement and the best method is to clearly define what is it that is not performing as expected and then work out if the expectation is...
I came across one unique parameter which I would like to share on our gurkulindia, specially for small business organisations where we dont have seperate power backups for DC. Has anyone noticed while working on Solaris boxes if you will power down (init 5 or poweroff...
Blog for Unix Admin / Solaris Admin / Storage Configs for Unixadmin
by Ramdev · Published February 14, 2012 · Last modified December 30, 2015
Below is the sample scenario where we tried to restore the dead paths of SAN connection using the powermt commands. Warning: Please use any of these commands only if you understand the current storage setup of your server clearly.
Solaris Troubleshooting / Unix Intermediate
by Ramdev · Published September 4, 2013 · Last modified July 2, 2015
It is common for Server environments to configure boot disks on external disks so that they can be easily migrated/moved for different reasons. During those scenarios, sometime we will have trouble to boot from the SAN devices and we will encounter with below kind of errors....
EMail Posts / Feed / Solaris 10 Zones & LDOMs / Solaris Admin / SUN LDOMS / Unix Intermediate
by Ramdev · Published October 14, 2015 · Last modified July 23, 2016
procedure to create a new partition table and a file system on a disk (or LUN) under Linux 1. List the available disks / LUNs with the following command: # fdisk -l
Blog for Unix Admin / Linux Disk Management
by Ramdev · Published May 18, 2011 · Last modified July 2, 2015
Dynamically adding LUN’s to Qlogic HBA on Linux: 1. Make sure that newly configured LUN’s are properly configured and mapped to correct HBA’s 2. If you have installed SANsurfer GUI/CLI, make sure newly added LUN’s are visible from these tools
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