问题
Good day to all. I have a little problem:
How do I close the sleeping connections to a database?
When I issue a query the query is executed then the connection remains on sleep mode for 2-3 seconds. The problem is that I generate queries faster than they are closed.
Is there a way to force a connection to close before entering in the sleep mode? Or any workaround.
Thank you for help.
Note: The connections are not permanent, they close, but just to slow... Note 2 - for the mysql_close(): The command is issued at the end of the query. Still the query goes into sleep mode before close. I attach a print screen in a min.
Notice the sleeping connections... they will be closed in 1-3 secs... but I generate another queries faster. I need to skip the sleep wasted time.
回答1:
Are you using mysql_pconnect() ? If not, this should not happen if you properly close every connection made to your database.
Edit : Similar issue ?
回答2:
Explicitly. For example, if you are using mysql then call mysql_close(). Or the equivalent for whatever database you are using.
回答3:
my class for dbconnection hast mysqli_close($this->conn);
in its __destruct() so that every connection is closed on destruction of the connection.
回答4:
Try setting the wait_timeout variable = 1 so they will close after 1 second.
来源：https://stackoverflow.com/questions/5041795/sql-php-close-a-sleeping-connection