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VFP Garbage Collection - Any Ideas?
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General information
Forum:
Visual FoxPro
Category:
Other
Miscellaneous
Thread ID:
00464933
Message ID:
00465732
Views:
14
Ed,
While sys(1104) appears to work, what does it do? I can't find it documented anywhere (Help, MSDN, Technet).

>Very interesting. I place the sys(1104) in my form manager class
>in between each form change, and system memory stays in check nicely on T/S.
>For VFP5, it seems the _Screen.Lockscreen=.F. or creating a
>form then destroying it are good tools for T/S applications..
>
>>Here's one you don't see everyday.
>>x = space(16777184)   && VFP memory jumps to between 36-39 MB
>>_Screen.LockScreen = .F.  && VFP memory drops to 18 MB
>>release x  && VFP memory drops to normal pre-x levels
>>It seems VFP puts a lot into system resources and the LockScreen causes these to be re-evaluated.
>>
>>HTH.
>>
>>>I'm hoping someone knows how to force VFP to do garbage collection.
>>>For example, on an NT machine with task manager watching the VFP memory allocated, I type:
>>>
>>>x = space(16777184) ' VFP allocates between 20-36meg of RAM
>>>x = Null
>>>Release x ' RAM stays allocated
>>>
>>>CLOSE ALL
>>>CLEAR ALL ' No luck - still allocated
>>>
>>>Is there any way to force memory allocation? SYS(3050) has
>>>no effect on this kind of memory allocation.
>>>
>>>We have a citrix box with many VFP apps running, and if one
>>>user runs a VFP routine which needs RAM, the RAM is staying
>>>allocated to that user indefinitely, slowing the other users
>>>down.
>>>
>>>If anyone has any insites, I would be very thankful.
>>>
>>>TIA,
>>>Ed
Larry Miller
MCSD
LWMiller3@verizon.net

Accumulate learning by study, understand what you learn by questioning. -- Mingjiao
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