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  #1  
Old 03-08-2009, 04:24 PM
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Default Database Optimisation Issue

Hiii..

I have 2 different vb databases, small enough, just around 10-12 MB each.

Now, issue is that my Site A has a very optimized database BUT my Site B doesn't.
Reason I say this is simple:-

1. Both have same resources, same db size but Site A runs smooth and faster than Site B.

2. When I try to optimize databases from admincp, Site A optimises in not more than 2 seconds and shows "Table is up to date" for almost every table WHEREAS Site B hangs inbetween while optimization, and I have to do it per 10-20 at a time. It hardly shows "Table is up to date" for any table.

3. Now, while investigating the issue, I noticed that tables in Site A show very accurate Data Length for every table BUT Site B has most of the table's Data Length to same 16 KB each (even when they are empty i.e. 0 bytes). Its something similar with both site tables Index Length too.

So, how do I make Site B as good as Site A. That 16 KB is surely some problem.

Thanks
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  #2  
Old 03-08-2009, 04:56 PM
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Lynne Lynne is offline
 
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Are both the sites on the same server or on different servers?
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  #3  
Old 03-09-2009, 01:53 AM
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Both are on same server!

Lynne, I am sure this has to do with Site B's database only. Something needs to be done manually.
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  #4  
Old 03-09-2009, 05:00 AM
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Dismounted Dismounted is offline
 
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Do both sites have the same modifications installed? Do they have the same number of people online?

These, and more variables, will affect a site's loading time.
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  #5  
Old 03-09-2009, 05:04 AM
BSMedia BSMedia is offline
 
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Try to run myisamchk from the SSH prompt for each table
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  #6  
Old 03-09-2009, 05:04 AM
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yes! Exactly same modifications. Both have light traffic and almost same.

I am not talking about site's loading time BUT the database optimization issue with Site B. Why is it showing 16kb data length for tables that have nothing, whereas, Site A shows correct as 0 bytes.
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  #7  
Old 03-09-2009, 03:04 PM
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Sometimes you have to run optimize (or repair) a couple of times.
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  #8  
Old 03-09-2009, 04:37 PM
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Ofcourse, running it twice or thrice is not making any difference.
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Old 03-09-2009, 04:49 PM
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Login via SSH and run myisamchk on each individual table.

You'll have to browse to the mysql folder where the .MYI type files are stored, and run it like

myisamchk -r table_name.MYI

or

myisamchk -r *.MYI
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  #10  
Old 03-09-2009, 04:58 PM
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oh I missed your previous post somewhow. Thanks for reply BS.

I forgot to tell that its a shared server and ofcourse, no SSH. But I do have a new server now, so I'll try to get Site B's database up there and run myisamchk. Will post results.

Thanks
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