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Sybase » Administration » DBA » Sybase IQ

Sybase IQ: Minimize Storage option

     

This options tells IQ to create a "1-Byte Fast Projection" index on all the columns (versus a Flat/Fast Projection index). This is good for some tables .. but, not good for others. When Minimize_Storage=On is beneficial
  • Table does not have a lot of columns ( < 40 )
  • Table would benefit from compression as a lot of the data is repeated (e.g. State, Street, Ticker, Area Code, First Name, Salary in 000's, Color, Price (rounded). )
  • Many/most of the columns are used in typical queries' where clauses
When Minimize_Storage=On is bad
  • Table has a lot of columns (over 50)
  • Table has a lot of complex numeric data or notations (e.g. price, # shares, position, currency rate, earnings, + any calculated #'s, text / notes )
  • Most of the columns never appear in the where clause






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