>>>>>>>>>>>>>A form includes in dataenvironment two tables: members and payments.
>>>>>>>>>>>>>Form runs pretty fast with small tables: members -2K records(2M) & payment-2K records(200K).
>>>>>>>>>>>>>Form runs very slow when tables are large: members -35K records(30M) & payment-117K records(11M).
>>>>>>>>>>>>>What can I change to increase form speed?
>>>>>>>>>>>>>
>>>>>>>>>>>>>Ed
>>>>>>>>>>>>
>>>>>>>>>>>>Table size itself shouldn't pose a problem. Probably, you run some queries, create view/cursors e.g. for Combo.Rowsource,etc. which slow down interface. If it's the case, try to optimize them.
>>>>>>>>>>>Hi Edward!
>>>>>>>>>>>Delay occures when I switch between pages (in pageframe) with different controlsource tables and at the start of the form.
>>>>>>>>>>>Ed
>>>>>>>>>>
>>>>>>>>>>Have to ask you again: do you have any Select-SQL statements, or List/Combo with SQL-query or cursor as rowsource, or maybe you have grids?
>>>>>>>>>
>>>>>>>>>Yes, I have grids on two pages of the form.
>>>>>>>>>How to optimize it?
>>>>>>>>>Ed
>>>>>>>>
>>>>>>>>What are grid recordsources? Do you set Column.ControlSource individually or use default?
>>>>>>>Column.ControlSource are the same as Column.Text.ControlSource and were set
>>>>>>>by default.
>>>>>>
>>>>>>What are grid recordsources (answer it, please!)? Do you use any Dynamic properties?
>>>>>No, I don`t use any dynamic properties
>>>>
>>>>Excuse me, are you kidding? I asked you two times already what is Grid.RecordSource. If you don't want to accept it, you can start new thread.
>>>I`m sorry. Probably I misunderstood you.(I`m still very weak in English)
>>>Grid.RecordSource = 'members'
>>>Grid.RecordSourceType = '1 - Alias'
>>>I don`t change any grid properties dynamicly
>>>Ed
>>
>>Ok. I just made quick test putting 3,5 million record table (350 M) into grid, and form opened momentarily. The last thing, I would check, is to make sure that you don't have temp relationships. Anyway, it would be good idea to make a test: create a form with a grid with one table, and see how it works.
>>BTW, what is your native language?
>Hi Edward!
>I didn`t set persistent relations in database, but I have set relation between
>members and payments in form.dataenvironment. I suggest that it`s refreshing cursor when we move between pages or form.refresh() is executed.
>My native languages are russian. idish, moldavian(roumanian).
>Thank You very much for support!
>Ed

Ok. Remove temp relationships and try again.
Znachit, wy iz Kishineva? Kak davno?