下面是对mongodb测试的代码和结果。虽然公司用的一水的CentOS，但是由于我是FreeBSD的支持者，所以在FreeBSD和CentOS上都测试了一
#!/usr/bin/env python
from pymongo import Connection
import time,datetime
connection = Connection('127.0.0.1', 27017)
db = connection['hawaii']
def func_time(func):
def _wrapper(*args,**kwargs):
start = time.time()
func(*args,**kwargs)
print func.__name__,'run:',time.time()-start
return _wrapper
@func_time
def remove():
posts = db.userinfo
print 'count before remove:',posts.count();
posts.remove({});
print 'count after remove:',posts.count();
if __name__ == "__main__":
remove()