sqlalchemy

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Mike Bayer cef4e5ff38 Warn on _compiled_cache growth

Added warnings to the LRU "compiled cache" used by the :class:`.Mapper`
(and ultimately will be for other ORM-based LRU caches) such that
when the cache starts hitting its size limits, the application will
emit a warning that this is a performance-degrading situation that
may require attention.   The LRU caches can reach their size limits
primarily if an application is making use of an unbounded number
of :class:`.Engine` objects, which is an antipattern.  Otherwise,
this may suggest an issue that should be brought to the SQLAlchemy
developer's attention.

Additionally, adjusted the test_memusage algorithm again as the
previous one could still allow a growing memory size to be missed.

Change-Id: I020d1ceafb7a08f6addfa990a1e7acd09f933240

2017-04-12 12:53:40 -04:00

__init__.py

- unit tests have been migrated from unittest to nose.

2009-06-10 21:18:24 +00:00

test_compiler.py

- Added new checks for the common error case of passing mapped classes

2015-08-22 12:47:13 -04:00

test_memusage.py

Warn on _compiled_cache growth

2017-04-12 12:53:40 -04:00

test_orm.py

Performance within instances()