BEA Global Alliances Technical Services

Web application session inspector

Introduction

This simple HttpSession inspector provides an estimate of the total size of the HTTP session and the size of each session attribute. These estimates are based on the amount of memory required to serialize each attribute, which gives a fair representation of the amount of effort required to replicate the session across a cluster. As a rule of thumb, the session size should not exceed 50 kB.

Some recommendations to keep the session size manageable:

Use page scope for temporary objects
Explicitly remove objects from the session when they are no longer used
Avoid storing large objects the session. Specifically, collections and maps such as Hashtable, HashMap, Vector, etc. should not be stored in the session.

Session information

Session id: MEUcy11l0uJvkk_mxL5fSEWw1x2kXbNuK3jSx7cm
Session created: 2026-05-13 21:41:33.963
Total session size: 0 bytes (0 kB)

Session attributes

The estimated size in the table below is based on the amount of memory (in bytes) required to serialize both the name and the value of each attribute. The table is sorted by the size of the attributes, with the largest attributes shown first.

This tool also uses the Java Reflection API on the attributes to see whether they use collection or map classes. Attributes that do use collection or map objects are marked in red. Non-serializable attributes are also indicated: you should only store serializable objects in the session.

Attribute name	Estimated size (bytes)	Class	Comments