FesonX / memoryTest

Python Flask-SQLAlchemy Memory Leaks Test - Python Flask-SQLAlchemy 内存泄漏测试

MemoryTest

Install Guide

Environment

1. Install interpreter, develop under Python 3.6
2. Install Python packagepip install -r requirements.txt
3. Install MySQL

Database Prepare

1. create your own db, create instance folder under project root path
2. create config.py under instance folder, add SQLALCHEMY_DATABASE_URI
3. run src/models.py to create table

Run Memory Leaking Test

python item_recorder.py

If you want to show the memory changes of a method

1. Install package. pip install memory_profile
2. Add a decorator on function

import profile

@profile
def method_to_log():
    pass

If you need to generate memory figure

1. install package. pip install matplotlib
2. record memory changes. mprof run item_recorder.py
3. display image. mprof plot mprofile_xxx.dat, xxx like a timestamp auto generated

If you need to record object growth

The objgraph.growth will show the increase in peak object counts since last call. Default is Top 10.

1. install package. pip install objgraph
2. add code

import objgraph
...# some code above...
objgraph.show_growth()

# If the program like a event-loop
# Try to catch `KeyboardInterrupt` event, like:
try:
    pass
except KeyboardInterrupt as e:
    objgraph.show_growth()

To fix the memory leak

Uncomment the line in src/__init__.py, or disable debug mode.

# app.config.update(SQLALCHEMY_RECORD_QUERIES=False)