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Memory leak with disconnected recordsets.
Message
From
31/05/2001 05:35:03
Cetin Basoz
Engineerica Inc.
Izmir, Turkey
 
 
To
30/05/2001 12:23:20
David Bennett
AdvoCare International LLC
Carrollton, Texas, United States
General information
Forum:
Visual FoxPro
Category:
COM/DCOM and OLE Automation
Miscellaneous
Thread ID:
00512735
Message ID:
00513045
Views:
16
>Hey guys, I've already posted this to microsoft.public.fox.programmer.exchange. I hope you don't mind...
>
>Anyway, I'd been having a memory leak problem and finally narrowed it down to the following code snippet:
>
>
>LOCAL oc, rs, i
>oc = CREATEOBJECT("ADODB.CONNECTION")
>oc.CursorLocation = 3 && ADUSECLIENT
>oc.Open("Provider=SQLOLEDB;Data Source=SQLSERVER;" + ;
>        "Database=pubs;User ID=sa;Password=;")
>rs = CREATEOBJECT("ADODB.RECORDSET")
>FOR i = 1 TO 10000
>    WAIT WINDOW LTRIM(STR(i)) NOWAIT
>    rs.ActiveConnection = oc
>    rs.Open("SELECT getdate()")
>    rs.ActiveConnection = .NULL. && Comment to plug the leak.
>    rs.Close()
>ENDFOR
>oc.Close()
>
>
>If you load up Performance Monitor and watch the Private Bytes of the VFP6 process, you'll see the memory usage skyrocket and never go back down. If you then comment out the line that disconnects the recordset (rs.ActiveConnection = .NULL.), the leak stops. Now, the exact same code in VB doesn't leak memory. So I'm pretty sure it's a VFP only thing. I've tested on VFP SP3/SP4/SP5, MDAC 2.5/2.6 running on both WIN2K SP2 and WINNT SP6. It appears to have been around for a long time. Has anyone else encountered this?
>
>- david

Also this might help.
PRB: ADO Disconnected Recordset Appears to Leak Memory when Editing in Place

Q269842

Cetin
Çetin Basöz

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