473,738 Members | 3,658 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

shouldn't mysql_pconnect force reuse of mysql connections?

Hi,

I have this function I call everytime I need to make a query from within
my php-scripts:

function db_connect ($user, $pwd, $db, $debug = 0)
{
$link = @mysql_pconnect ("localhost" , "$user", "$pwd");
if($link && mysql_select_db ("$db"))
if($debug == 1) {
printf("Connect ion OK!");
}
Return ($link);
if($debug == 1) {
printf("Connect ion not ok!");
}
Return (FALSE);
}

I thought that making another or a third call to db_connect would reuse
the same connection to the database, since I use mysql_pconnect( ) to
connect. But listing the active processes indicates something else:
+-------+-------+-----------+-------+---------+------+-------+--------------
----+
| Id | User | Host | db | Command | Time | State | Info
|
+-------+-------+-----------+-------+---------+------+-------+--------------
----+
| 64494 | thore | localhost | thore | Sleep | 222 | |
|
| 64497 | thore | localhost | thore | Sleep | 218 | |
|
| 64505 | thore | localhost | thore | Sleep | 207 | |
|
| 64552 | thore | localhost | thore | Sleep | 15 | |
|
| 64557 | thore | localhost | thore | Sleep | 0 | |
|
| 64563 | thore | localhost | thore | Sleep | 5 | |
|
| 64564 | thore | localhost | | Query | 0 | | show
processlist |
+-------+-------+-----------+-------+---------+------+-------+--------------
----+

Have I misunderstood the process listing, the meaning of mysql_pconnect( )
or am I using mysql_pconnect( ) the wrong way when I call my function
db_connect() before every query I make?

--
anders thoresson

--
MySQL General Mailing List
For list archives: http://lists.mysql.com/mysql
To unsubscribe: http://lists.mysql.com/my***********...ie.nctu.edu.tw

Jul 19 '05 #1
0 1488

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

3
2787
by: Randell D. | last post by:
Folks, I currently connect to my db with PHP code that uses non-persistent connections. I've read that persistent connections can help performance since a connection to the db will use an existing unused connection. If my system was to go through a busy period whereby I seen an extra 50% or more activity for ten minutes or so, would the extra connections stay alive for ever or is there a time limit of inactivity? Would the unused...
4
2548
by: Yun Guan | last post by:
Hello folks, In my php scripts, those mysql functions, like mysql_pconnect() and mysql_connect() are said to be undefined. What do I miss here? Thanks. -- Allen Guan 281-489-2314
0
1064
by: anders thoresson | last post by:
Hi, I have this function I call everytime I need to make a query from within my php-scripts: function db_connect ($user, $pwd, $db, $debug = 0) { $link = @mysql_pconnect("localhost", "$user", "$pwd"); if($link && mysql_select_db("$db")) if($debug == 1) {
4
6588
by: OneSolution | last post by:
Coming from a java background, I've been taught that connection pooling is the best thing due to the obvious benefits. I found out that the above pconnect() function will pool connections. So how do you use it properly? There's another post in this list stating that the user got connection refused error messages. Also, is there a real performance increase due to connection pooling with MySQL in PHP?
4
4177
by: Angelos | last post by:
I get this error mysql_pconnect Too many connections ... every now and then. Does anyone knows where it comes from ? There are a lot of sites running on the server and all of them use the Database frequently. Is there any configuration that I will have to do to my server in order to handle the load ? Thank you... I would appreciate answers from someone that already experienced that
1
1533
by: WhatsPHP | last post by:
Can I use mysql_pconnect on an environment like this? There is just 1 server on which both PHP and MYSQL runs. It is an intranet server. At any point atleast 2 people will be actively using the server for their work. If the script uses mysql_pconnect and then the normal user name and password, will this speed up execution of scripts on the server by any chance? Fut
11
1677
by: =?ISO-8859-1?Q?J=F8rn?= Dahl-Stamnes | last post by:
Hello, I have been using mysql_connect in a script that display a lot of thumbnails for an album. Each thumbnail is displayed using the code: <IMG SRC="thm.php?id=some_id" ALT="some title"> thm.php use a mysql_connect to the database to access the info about the picture based on the id.
4
2076
hsriat
by: hsriat | last post by:
Got an issue regarding this... As said above (same as what php.net says), if we use mysql_pconnect(), it doesn't create more connections, if the connection parameters are same as the existing pconnection's. But if the already set pconnection is too busy serving others, would the next request of pconnect create another connection then or would still wait for the first query to complete before serving it? This will actually end up...
9
1887
by: John Murtari | last post by:
Folks, We have a fairly busy web site present using PHP 5 to talk to a MySQL 5.0.45 DB on an Apache 1.3 series server. It's spread out over several physical hosts (one DB server), we use DB tracking of sessions and there is some transaction usage also. Right now we keep it simple using mysql_connect. I'd looked at mysql_pconnect a few years but got scared away by the warnings about problems. Somebody here wanted to revisit that
0
8968
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
8787
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
9473
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
9208
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
8208
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
6053
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4569
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
3279
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
2744
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.