Various ProxySG high CPU causes and related solutions
High CPU utilization is being recorded on the ProxySG
There are many different reasons why high CPU utilization may occur on the ProxySG platform. This document attempts to be a clearing house for the various reasons why high CPU utilization may occur on the ProxySG platform. There may be other reasons not documented here. Over time, as new sources of high CPU utilization occur, they will be added to this document.
Basic troubleshooting steps for high utilization issues:
It is helpful to be aware of external, use behavior factors, that may cause excessive load on the proxy.
Questions you should be answering here are:
Once you have identified which proxy it is, when, and for how long the high CPU event occurs, we then need to get to the root cause of why it occurs. To do so, we need to establish which SGOS service, or services, are putting the most burden on the CPU. We do this by enabling the CPU monitor, and then taking snapshots at five minute intervals. By watching the trend on each CPU monitor statistics, using each successive snapshots , we can then draw a conclusion as to which service is taking the most CPU cycles.
To do this, follow these steps:
1: To enable to CPU monitor:
NOTE: Once you have finished taking snapshots, be sure to turn the CPU monitor off.
2: To configure the ProxySG to take snapshots at 5 minute intervals:
NOTE: To view the snapshot, wait five minutes, and then follow these steps:
3: Taking a Full Core:
If it is not obvious that any one particular service is dominating the CPU, or the collected data is inconclusive, you might need to take a full memory coredump, as per this article KB3800. Please consult with your Blue Coat Technical Support Engineer as to whether a full memory core is needed or not.
Once you have identified which feature is consuming you CPU, please review the list of articles below for a possible solution. Depending on which which services are causing the high CPU, see these articles for more information on how to resolve them.
NOTE: For a list of what Proxy SG versions contain fixes for high utilization issues, see FAQ903
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