Actually, with a pconnect, there would be a trade off. Since it uses a shared connection, the last insert ID could change between the update and calling the api function. But as I said, it doesn't matter for the counter.
Matthew Walker Senior Software Engineer ePliant Marketing -----Original Message----- From: Benjamin Pflugmann [mailto:[EMAIL PROTECTED]] Sent: Sunday, April 14, 2002 9:47 PM To: Matthew Walker Cc: Craig Westerman; MySQL List Subject: Re: MySQL counter for HIGH traffic site Hi. There is a one-query method to do that and it is even explicitly documented: http://www.mysql.com/doc/M/i/Miscellaneous_functions.html (under LAST_INSERT_ID([expr])). This requires an UPDATE and using a client API function like mysql_insert_id(). No locks needed and the operation is atomic (i.e. no 'precision' trade-off). Bye, Benjamin. On Sun, Apr 14, 2002 at 09:11:03PM -0600, [EMAIL PROTECTED] wrote: > I'd recomment PHP4 using pconnect and MySQL. And I'd /not/ use locking > on the table. Run a query to update the row, then run a select to grab > the current total. In the case of a counter, it doesn't require the > precision that most things would. (i.e., it's okay if the row you read > doesn't have the value you just set in the update.) > > As far as performance goes, my PHP app can do 40+ queries in less that > .05 seconds. So you shouldn't have problems there. [...] -- [EMAIL PROTECTED] --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.345 / Virus Database: 193 - Release Date: 4/9/2002 --------------------------------------------------------------------- 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
