opendev/lodgeit
Code Issues Proposed changes

Tuning pool_recycle to avoid MySQL server gone away

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Some time after lodgeit application have no load
SQLalchemy connection expires and application dies
with 5xx error and MySQL Server gone away exception.

By using a shorter default pool_recycle of 3600s which
can also be tweaked using environment variables, it allows
you to avoid dealing with this issue.

Change-Id: I79eb823458c604b2faff9bb1e9531c45fc1ed3cb
This commit is contained in:
Igor Shishkin 2015-08-28 14:45:40 +03:00 committed by Mohammed Naser
parent 54727daa85
commit f53434f935
1 changed files with 5 additions and 3 deletions
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8
lodgeit/application.py
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@ -24,11 +24,12 @@ from lodgeit.controllers import get_controller
class LodgeIt(object): class LodgeIt(object):
"""The WSGI Application""" """The WSGI Application"""
def __init__(self, dburi, secret_key): def __init__(self, dburi, secret_key, pool_recycle=3600):
self.secret_key = secret_key self.secret_key = secret_key
#: bind metadata, create engine and create all tables #: bind metadata, create engine and create all tables
self.engine = engine = create_engine(dburi, convert_unicode=True) self.engine = engine = create_engine(
dburi, convert_unicode=True, pool_recycle=pool_recycle)
db.metadata.bind = engine db.metadata.bind = engine
db.metadata.create_all(engine, [Paste.__table__]) db.metadata.create_all(engine, [Paste.__table__])
@ -84,7 +85,8 @@ def make_app(dburi=None, secret_key=None, debug=False, shell=False):
secret_key = os.getenv('LODGEIT_SECRET_KEY') secret_key = os.getenv('LODGEIT_SECRET_KEY')
static_path = os.path.join(os.path.dirname(__file__), 'static') static_path = os.path.join(os.path.dirname(__file__), 'static')
app = LodgeIt(dburi, secret_key) app = LodgeIt(dburi, secret_key,
pool_recycle=os.getenv('LODGEIT_POOL_RECYCLE', 3600))
if debug: if debug:
app.engine.echo = True app.engine.echo = True
app.bind_to_context() app.bind_to_context()