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Performance re-index before/after defragmentation?
Message
De
02/02/2003 12:34:06
 
 
Information générale
Forum:
Visual FoxPro
Catégorie:
Base de données, Tables, Vues, Index et syntaxe SQL
Divers
Thread ID:
00748158
Message ID:
00748186
Vues:
23
>>>Jim,
>>>>
>>>>2) REINDEX (except in VFP7SP1) will remove CDX "bloat" of both the deleted TAG variety and the 'random inserts causing extra nodes' variety. A smaller file is always better and I should think especially so where it is a .CDX. A REINDEX will also result in a 'contiguous' (as much as available RAM will allow) .CDX file as its output.
>>>>
>>>
>>>You're confusing index size with index bloat. REINDEX command in any version of VFP will remove index bloat.
>>
>>Well I'd like to know how you can conclude that with the evidence at hand. I have shown that a VFP7SP1 REINDEX does not shrink the CDX, nor grow it (by any more than 512 bytes and only in some cases).
>>In this case, how can you be so sure that "bloat" is removed????
>
>In part, based on your tests posted at http://fox.wikis.com/wc.dll?Wiki~CDXBloat~VFP. See #7. I quote "CDX size is reduced in all releases".


Right, and that mis-adventure is regarding TAG deletion only. Please note that I used the word "both" in my original. Do you wonder why the second tests for "insertion bloat" were never delivered, as the article in question said they would be???

cheers
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