PHP and pconnect
Hi The I have noticed that the number of Aborted Clients and Aborted Connections has increased sharply recently on our two production servers, but not on our development server. Yesterday we started getting a number of blocked host errors, which we had to clear up with flush hosts. http://www.mysql.com/doc/B/l/Blocked_host.html This morining, I increased the max_connect_errors from 10 to 1, and the problem has thankfully disappeared. I know that this hides the problem, but I am at a loss to explain the cause. The favourite causes are - use of mysql_pconnect (introduced in Novemeber) - use of fsockopen($Primary, 3306, $errno,$errstr,5) (closed by fclose()) to test if connection possible before attempting connection (introduced last week) - much high web activity causing recycling of httpd processes mysql_pconnect was used to improve performance, and reduce load -- it works fsockopen is used to determine if the web process should use the local, or remote database. Can anyone shed any light on the causes of Aborted Clients and Connects, and whether mysql_pconnect and fsockopen would have an effect ? Simon - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
PHP and pconnect
Hi The I have noticed that the number of Aborted Clients and Aborted Connections has increased sharply recently on our two production servers, but not on our development server. Yesterday we started getting a number of blocked host errors, which we had to clear up with flush hosts. http://www.mysql.com/doc/B/l/Blocked_host.html This morining, I increased the max_connect_errors from 10 to 1, and the problem has thankfully disappeared. I know that this hides the problem, but I am at a loss to explain the cause. The favourite causes are - use of mysql_pconnect (introduced in Novemeber) - use of fsockopen($Primary, 3306, $errno,$errstr,5) (closed by fclose()) to test if connection possible before attempting connection (introduced last week) - much high web activity causing recycling of httpd processes mysql_pconnect was used to improve performance, and reduce load -- it works fsockopen is used to determine if the web process should use the local, or remote database. Can anyone shed any light on the causes of Aborted Clients and Connects, and whether mysql_pconnect and fsockopen would have an effect ? Simon - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
Re: PHP and pconnect
- use of mysql_pconnect (introduced in Novemeber) - use of fsockopen($Primary, 3306, $errno,$errstr,5) (closed by fclose()) to test if connection possible before attempting connection (introduced last week) - much high web activity causing recycling of httpd processes You're putting more load on everything by opening the connection with fsockopen. Simply do the following: $db = @mysql_pconnect(...); if (!$db) die(connection failed); Can anyone shed any light on the causes of Aborted Clients and Connects, and whether mysql_pconnect and fsockopen would have an effect ? I'd guess your fsockopen calls are causing Aborted Clients to rise. If you still have problems after fixing that, then my first idea would be that PHP does not clean up properly when a client aborts the page by pressing the stop button. This would be rather easy to test. If you're using Apache, you can also try setting MaxRequestsPerChild to something like 1, so that after a while the process will die and hopefully close any open connections to the MySQL server. Or if you're already doing this, try disabling it and seeing if it helps. - Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail [EMAIL PROTECTED] To unsubscribe, e-mail [EMAIL PROTECTED] Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
