Heap Dump
Heap dumps show details about the memory allocation and distribution in the shared pool and library cache including the details about the objects. It will also show the details about the cursors and the latch information when level 2 is used. It will have the details about the memory chunks (free, freeable, permanent, and recreatable) and their sizes. It will also have the information about the hash buckets and freelists inside the shared pool. Heap dumps are often requested by Oracle Support to diagnose shared pool related errors.
Syntax
Following methods show how to produce a heap dump.
Using ALTER SESSION
The first ALTER SESSION below will immediately produce a heap dump at supplied level number, while the second ALTER SESSION command ...
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