Memory leak occurs when there are a large number of SSO and TSA authenticated users.

Symptom:

Memory leak occurs when there are a large number of SSO and TSA authenticated users.

Condition or Workaround:

Occurs when running traffic with 1,000 or more SSO and TSA authenticated users for multiple days.

Resolution or Workaround: 

Upgrading to SonicOS Enhanced 5.6.0.3 release resolves the issue.

Tracking ID: 89757

Source: SonicOS Enhanced 5.6.0.3 Release Notes