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Slow table access
Message
 
To
26/07/1999 12:45:35
Walter Meester
HoogkarspelNetherlands
General information
Forum:
Visual FoxPro
Category:
Databases,Tables, Views, Indexing and SQL syntax
Miscellaneous
Thread ID:
00246110
Message ID:
00246307
Views:
13
>
>A solution might be to make a offline-copy of the table and use this table to make reports etc.

* This is basically what the interim table will be doing if I go that way.

>
>If not possible try to convince yourself of the folowing:
>
>- The app does not apply File locking in any code. for e.G:
> DO not use: REPLACE field WITh valueexpression FOR somecondition
> But use:
> SCAN FOR somecondition
> REPLACE Field WITH ValueExpression
> ENDSCAN
>
>- The app doesn't use pessimistic buffering.
>- The app will prohibit deadlocks (By using a SET REPROCESS TO n SECONDS and handling errors)
>- The right indexes are used on the table: Not too much indexes, not too less.
>- You don't use a tag on deleted() (unless the table contains millions of deleted records) Indexes themself take up time to in optimization and in modifying data. Asure yourself that the indexes on the table are needed.
>
>Some other considerations, thoughts and comments:
>- Is the network trafic too high ?
>- Which network (Novell, NT ?, others ?)
>- 10 MB, 100MB network, network achitecture ?
>
>Good luck,
>
>Walter,

All these points have been covered over the last couple of months (it was one hell of a mess before then).
Nigel B Coates
NBC Software Services
Dublin, Ireland.
eMail: Nigel.Coates@NBCSoftware.com
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