What is the difference between statistic TCP2.355 and TCP2.356?

Products

• ISG Proxy
• ProxySG Software - SGOS

Issue/Introduction

TCP2.355 and TCP2.356 can be used when troubleshooting issues with high memory usage and CPU utilization.

The statistics can be viewed from the SYSinfo.

The advanced URL for the statistics is "/TCP/Statistics".

Resolution

TCP2.355 is "Number of SYNs ignored due to acceptance regulation"
This occurs if the memory usage spikes, the proxy will ignore the SYN packet, and delay it, waiting for the retry of the SYN, at which time (typically a second later) the SG will reevaluate if it should let in the SYN or not.
 
TCP2.356 is "Number of accepted regulations due to high CPU"
This occurs when the CPU utilization gets high, the proxy will delay accepting the socket from the listening queue to pace out the new client workers or connections.