mirror of
https://github.com/sqlalchemy/sqlalchemy.git
synced 2026-06-03 22:35:46 -04:00
Mike Bayer
52 lines
1.1 KiB
Python
52 lines
1.1 KiB
Python
import gevent.monkey
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gevent.monkey.patch_all()
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import logging
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logging.basicConfig()
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#logging.getLogger("sqlalchemy.pool").setLevel(logging.INFO)
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from sqlalchemy import event
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import random
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import sys
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from sqlalchemy import create_engine
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import traceback
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engine = create_engine('mysql+pymysql://scott:tiger@localhost/test',
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pool_size=50, max_overflow=0)
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@event.listens_for(engine, "connect")
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def conn(*arg):
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print "new connection!"
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def worker():
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while True:
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conn = engine.connect()
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try:
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trans = conn.begin()
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for i in range(5):
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conn.execute("SELECT 1+1")
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gevent.sleep(random.random() * 1.01)
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except:
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#traceback.print_exc()
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sys.stderr.write('X')
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else:
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conn.close()
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sys.stderr.write('.')
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def main():
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for i in range(40):
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gevent.spawn(worker)
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gevent.sleep(3)
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while True:
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result = list(engine.execute("show processlist"))
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engine.execute("kill %d" % result[-2][0])
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print "\n\n\n BOOM!!!!! \n\n\n"
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gevent.sleep(5)
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print(engine.pool.status())
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main()
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