The only reason it uses two is if the code using persistent connections connects with different credentials. ie. you have 2 different apps on the same server that connects as 2 different user ids and they are both using persistent connections. Eventually every httpd will have 2 connections.
-R On Tue, 30 Jul 2002, Andrey Hristov wrote: > Hello, > last week I read this article : > http://phplens.com/lens/php-book/optimizing-debugging-php.php > It is long one. Extract from it (look where is it and read around it): > [snip] > Overload on 40 connections > > When we pushed the benchmark to use 40 connections, the server overloaded > with 35% failed requests. On further investigation, it was because the MySQL > server persistent connects were failing because of "Too Many Connections". > > The benchmark also demonstrates the lingering behavior of Apache child > processes. Each PHP script uses 2 persistent connections, so at 40 > connections, we should only be using at most 80 persistent connections, well > below the default MySQL max_connections of 100. However Apache idle child > processes are not assigned immediately to new requests due to latencies, > keep-alives and other technical reasons; these lingering child processes > held the remaining 20+ persistent connections that were "the straws that > broke the Camel's back". > > The Fix > > By switching to non-persistent database connections, we were able to fix > this problem and obtained a result of 5.340 seconds. An alternative solution > would have been to increase the MySQL max_connections parameter from the > default of 100. > > [/snip] > > Andrey > > ----- Original Message ----- > From: "Rasmus Lerdorf" <[EMAIL PROTECTED]> > To: "Andrey Hristov" <[EMAIL PROTECTED]> > Cc: "Paul Worthington" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> > Sent: Tuesday, July 30, 2002 7:59 PM > Subject: Re: [PHP-DB] mysql_fetch_array limit? - more details > > > > What do you mean it uses 2? It does not. > > > > On Tue, 30 Jul 2002, Andrey Hristov wrote: > > > > > Maybe it will help you but I've read that when using persistent > connections > > > PHP uses 2 on every request. > > > So if in one moment you have 10 scripts,that use persistent connections, > > > running you will have 20 connections used to the mysql. > > > > > > Regards, > > > Andrey > > > ----- Original Message ----- > > > From: "Paul Worthington" <[EMAIL PROTECTED]> > > > To: <[EMAIL PROTECTED]> > > > Sent: Tuesday, July 30, 2002 5:34 PM > > > Subject: [PHP-DB] mysql_fetch_array limit? - more details > > > > > > > > > > I'm running MySQL 3.23.47 and PHP 4.1.2 on Mac OS X 10.1.5. > > > > > > > > In my table, I've got two fields: Name VARCHAR(35) and txtSWDesc1 > TEXT. > > > > According to the manual, TEXT will give me a maximum space of 65,536 > > > > bytes per field. I've entered text in this field in the amount of > > > > approximately > > > > 500 characters. > > > > > > > > I'm using this PHP code, very simple and straightforward, to select > two > > > > columns into an array and then display the results in an HTML table: > > > > > > > > ............................................................................ > > > > .................................. > > > > $db = mysql_connect("localhost", "user1"); > > > > mysql_select_db("testdb",$db); > > > > $sql = "SELECT * FROM tmp ORDER BY Name"; > > > > $result = mysql_query($sql,$db); > > > > > > > > echo "<TABLE>\n"; > > > > echo "<TR>\n<TH>Place Name</TH>\n<TH>Description</TH>\n</TR>\n"; > > > > while ($myrow = mysql_fetch_array($result)) { > > > > printf("<TR><TD>%s</TD><TD>%s</TD></TR>\n", $myrow[Name], > > > > $myrow[txtSWDesc1]); > > > > } > > > > echo "</TABLE>\n"; > > > > > > > > ............................................................................ > > > > ............................... > > > > What happens is I'm only getting the first 256 characters of > txtSWDesc1 > > > > displayed in my table. I am assuming the problem is in > > > > mysql_fetch_array(), that it must have some size limitation that > > > > truncates whatever data it has read to exactly 256 chars. Another > > > > possibility is that the mysql_query() could be truncing the result. > I've > > > > checked my data directly in MySQL, and all the characters are there in > > > > direct SELECTs. > > > > > > > > Can someone please help? I've checked all manuals and FAQs I can, but > I > > > > can't figure out why I'm having this problem. It should not be > happening > > > > at all. Is there some size limitation to the array created via > > > > mysql_fetch_array()? Is there some other function that will accomodate > > > > my data? Is there any custom code to handle my data correctly? > > > > > > > > Thanks, > > > > Paul Worthington > > > > [EMAIL PROTECTED] > > > > > > > > > > > > -- > > > > The views expressed here are those of the user, not necessarily those > of > > > > Evolving Systems, Inc. > > > > > > > > > > > > > > > > -- > > > > PHP Database Mailing List (http://www.php.net/) > > > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > > > > > > > > > > > -- > > > PHP Database Mailing List (http://www.php.net/) > > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > > > > > -- > > PHP Database Mailing List (http://www.php.net/) > > To unsubscribe, visit: http://www.php.net/unsub.php > > > > > -- PHP Database Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
