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()
，