Category: Solaris Performance Monitoring

10

Solaris Network Performance Tuning : know about TCP window size

Our Unixadmin, John from xyz company,  recently upgraded one of his server’s network interface card  from the old one with 100MB speed to a new one with 10Gig speed , and the reason is to improve the speed for the backup of the server. After the NIC Upgrade  john found that the server network...

1

Performance Monitoring : Vmstat – to find performance bottleneck

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...

Solaris Performance Information Center

Read – Identify memory usage by a specific process Read – Use Vmstat to find performance bottleneck Read – Generating System Utilization Statistics Read – [Video] Finding CPU / IO / Memory Bottlenecks Read – Memory usage checking and troubleshooting Read – Calculate Collision rate in...

6

Solaris Troubleshooting : Calculate Collision rate in ethernet network

Collisions may occour on ethernet links which are operating at Half Duplex (HDX). They do not occour on links using Full Duplex (FDX). The normal formula to calculate the packet collision rate is: ( collisions / output packets ) * 100 = collision rate For example: #...

18

Solaris Troubleshooting : Memory usage checking and troubleshooting

First you’ll need to check  how much Memory is used in Kernel and how much is used in User Memory. This is important to decide, what troubleshooting steps are required. A nice mdb dcmd ( this command can take several minutes to complete, and you have...

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