This is a slightly modified version of dowser from http://e-mats.org/2013/01/debugging-pythons-memory-usage-with-dowser/

Changes:

• Cherrypy integration replaced with aiohttp
• Python 2 is not supported anymore. Python 3 only (you should expect it with aiohttp)
• Added support for pympler to find heavy objects and measure object sizes
• Added support for tracemalloc to find memory allocations
• Added option to search only for types having at least N instances
• Added option to sort object types by instance count or total size
• Fixed displaying object info when its attributes cannot be represented

To integrate dowser to your aiohttp server, use:

import dowser
dowser.setup(existing_app)

This will bind sub-path /dowser/ to your existing aiohttp app. Alternatively one can specify custom sub-path:

dowser.setup(existing_app, bind_path='/.secret-dowser/')