Why Increasing Buffer Credits Is Not A Cure For A Slow Drain Device


When I am working on performance problems, a frequent question I  get is why increasing buffer credits for a particular port is not a fix for a slow drain device attached to that port.  In this video, I explain the concept of congestion and illustrate why increasing the number of buffer credits is not a fix, without addressing the underlying cause of the congestion.   There are some exceptions to this rule.  The most common is when dealing with long-distance links, but that will be addressed in a future blog post (and perhaps a future video).  




As always,  you can leave feedback in the comments, or find me on LinkedIn or Twitter

Comments

Popular posts from this blog

Troubleshooting Slow Drain Devices on Broadcom Switches

Spectrum Virtualize NPIV and Host Connectivity