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Deferred Threadviews v1.00 (to reduce server load) Details »»
Deferred Threadviews v1.00 (to reduce server load)
Version: 1.00, by Jujubee Jujubee is offline
Developer Last Online: May 2009 Show Printable Version Email this Page

Version: 2.2.x Rating:
Released: 06-21-2002 Last Update: Never Installs: 34
 
No support by the author.

Hack name: Deferred Threadviews
Version: 1.00
Purpose:
To reduce server load by not updating the view count on every page view but instead keeping the it in memory and writing to the db only occasionally.
Functions:
? Logs threadviews to a temporary table, and periodically commits data to the thread table.
? Frequency of writes controlled by server load and a random number.
? Includes optional email notification.
vB version tested on: 2.2.6
PHP version tested on: 4.2.0
Acknowledgements: Thanks to MattR for the "store threadviews as list of non-unique ids and use count(*)" suggestion that removed 1 query per pageview.



The updating of threadviews has been identified as a main cause of high server loads. This hack basically writes threadviews to a HEAP table (i.e. temporary table residing in memory) and will only update the thread count when the load is below a specified value and a random # value is hit.

(The impetus for this hack was an email from my host: They threatened to boot me off my server due to CPU usage "abuse", so as part of a larger effort, I decided to write this hack. *crossing fingers*)

SUMMARY of changes:
1) Set 1 Admin CP option
2) Create MySQL table
3) Insert code into SHOWTHREAD.PHP

The code will optionally send you an email every time the threadviews are committed to the thread table.

More details are in the text file.


This is what the email you'll get looks like:
Quote:
2395 Total Views (original number of write queries)
170 Threads (new number of write queries)

93% of Writes Avoided [2225 avoided]
14:1 Original Writes vs. Consolidated Writes

Version History:

0.9 - Initial Release
0.91 - removed need for reading of temp table before writing to it (thanks to MattR). Note that if you've been using 0.9, you must re-create the my_threadviews table as it's structure has changed.
0.92 - added reporting of the ratio of Original Writes vs. Consolidated Writes. Use this to help in tweaking the frequency of updates. If the ratio is low, (e.g. 2:1, 5:1, etc) it probably means updates are occuring too often. (The ratio will also be low if you have many separate threads that are viewed a small number of times.)
1.00 - No code changes. Changed version to 1.00 since it's been stable for the past 2 months.

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  • This modification may not be copied, reproduced or published elsewhere without author's permission.

Comments
  #22  
Old 06-24-2002, 12:14 PM
Okiewan's Avatar
Okiewan Okiewan is offline
 
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Worth the effort (in general) for a baord with 100- 150 online?
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  #23  
Old 06-24-2002, 03:36 PM
Jujubee Jujubee is offline
 
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Quote:
Originally posted by Okiewan
Worth the effort (in general) for a baord with 100- 150 online?
This hack is worth the effort if you need to reduce your load. If you've got 150 users but no load problems, then it's not really necessary. If you're load is above 2, then this hack should help a little.
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  #24  
Old 06-24-2002, 04:11 PM
CJi CJi is offline
 
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I get edgy when our load goes above 1.2, so I'm going to put this hack in tomorrow and see how we do.
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  #25  
Old 06-24-2002, 09:50 PM
Jujubee Jujubee is offline
 
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Well, after about 18 hours of high load today (shared server), I got this email:
Quote:
5566 Total Views (original number of write queries)
278 Threads (new number of write queries)
5288 Writes Avoided (95% avoided)
5500 MySQL queries distilled into 280 -- now that's what I call efficiency. :bunny:
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  #26  
Old 06-24-2002, 10:01 PM
VirtueTech VirtueTech is offline
 
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Quote:
Originally posted by Jujubee
Well, after about 18 hours of high load today (shared server), I got this email:


5500 MySQL queries distilled into 280 -- now that's what I call efficiency. :bunny:
What are your settings all around?
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  #27  
Old 06-24-2002, 10:27 PM
Jujubee Jujubee is offline
 
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Quote:
Originally posted by VirtueTech


What are your settings all around?
My settings? Which ones?
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  #28  
Old 06-24-2002, 10:39 PM
VirtueTech VirtueTech is offline
 
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Quote:
Originally posted by Jujubee


My settings? Which ones?
The 3 settings for the script.
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  #29  
Old 06-24-2002, 11:53 PM
Jujubee Jujubee is offline
 
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Quote:
Originally posted by VirtueTech


The 3 settings for the script.
I'm using the default settings.
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  #30  
Old 06-25-2002, 06:22 PM
CJi CJi is offline
 
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After a little bit of tweaking with the settings, I'd say this works rather well

1149 Total Views (original number of write queries)
308 Threads (new number of write queries)

841 Writes Avoided (73% avoided)

Congratulations on a fantastic hack!
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  #31  
Old 06-26-2002, 02:39 PM
ColinP ColinP is offline
 
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Fantastic hack
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Powered by vBulletin® Version 3.8.12 by vBS
Copyright ©2000 - 2024, vBulletin Solutions Inc.
X vBulletin 3.8.12 by vBS Debug Information
  • Page Generation 0.05389 seconds
  • Memory Usage 2,306KB
  • Queries Executed 25 (?)
More Information
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Phrase Groups Available:
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Hooks Called:
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