Previous Thread
Next Thread
Print Thread
Rate Thread
#260616 10/14/2003 7:17 AM
Joined: Feb 2002
Posts: 950
P
Hacker
OP Offline
Hacker
P
Joined: Feb 2002
Posts: 950
Let me just say my experience with persistant connections did not work out. I have two Threads systems on my dual xeon processor dell server with 2gb of ram. I fugred persistant would be good. I was very wrong.

SHOW STATUS showed hundreds of connections, many waiting on a timeout. 100% memory usage and about 1.5gb of swap usage. My server went from 2,000 queries/min to its current level of around 6,000 queries/min and persistant connections was a real bad idea.

Just in case anyone else was considering it - it would seem that high traffic sites should avoid this.

Sponsored Links
gailg #260617 10/14/2003 8:57 AM
Joined: Apr 2002
Posts: 1,768
D
Addict
Offline
Addict
D
Joined: Apr 2002
Posts: 1,768
I'd like to see an explanation of exactly how a persistent connection works, as opposed to a non-persistent connection.

1) What processing is performed when creating/destroying a non-persistent connection?

2) What processing is performed when re-using a persistent connection?

3) How much resources (memory, disk space, etc.) does a "connection" take?

4) When using persistent connections, is there any risk of users getting data intended for a different user?

Joined: Dec 2000
Posts: 1,471
A
Addict
Offline
Addict
A
Joined: Dec 2000
Posts: 1,471
There's a chapter in the php manual, that explains the basics:

http://www.php.net/manual/en/features.persistent-connections.php

gailg #260619 10/19/2003 1:30 AM
Joined: Oct 2002
Posts: 165
S
Member
Offline
Member
S
Joined: Oct 2002
Posts: 165
Is this Persistant option you refer to the one within UBBT config or in my.cnf file?

Joined: Feb 2002
Posts: 950
P
Hacker
OP Offline
Hacker
P
Joined: Feb 2002
Posts: 950
UBBT.... I will say that the persistant feature *may* be benefitial on smaller sites; its just that I run a Dual Xeon processor machine with 2GB of RAM and the hundreds of processes running killed my server.

Sponsored Links

Link Copied to Clipboard
Donate Today!
Donate via PayPal

Donate to UBBDev today to help aid in Operational, Server and Script Maintenance, and Development costs.

Please also see our parent organization VNC Web Services if you're in the need of a new UBB.threads Install or Upgrade, Site/Server Migrations, or Security and Coding Services.
Recommended Hosts
We have personally worked with and recommend the following Web Hosts:
Stable Host
bluehost
InterServer
Visit us on Facebook
Member Spotlight
AllenAyres
AllenAyres
Texas
Posts: 21,079
Joined: March 2000
Forum Statistics
Forums63
Topics37,552
Posts293,830
Members13,842
Most Online5,166
Sep 15th, 2019
Today's Statistics
Currently Online 238
Topics Created 0
Posts Made 0
Users Online 1
Birthdays 5
Top Posters
AllenAyres 21,079
JoshPet 10,369
LK 7,394
Lord Dexter 6,708
Gizmo 5,809
Greg Hard 4,625
Top Posters(30 Days)
stell 3
Gizmo 1
Morgan 1
isaac 1
Top Likes Received
isaac 66
Gizmo 12
Brett 7
Morgan 2
Top Likes Received (30 Days)
None yet
The UBB.Developers Network (UBB.Dev/Threads.Dev) is ©2000-2021 VNC Web Services

 
Powered by UBB.threads™ PHP Forum Software 8.0.0
(Snapshot build 20201211)
Responsive Width:

PHP: 5.4.45 Page Time: 0.041s Queries: 25 (0.014s) Memory: 3.2852 MB (Peak: 3.4760 MB) Data Comp: Zlib Server Time: 2021-03-06 16:32:50 UTC
Valid HTML 5 and Valid CSS