BorlandTalk.com Borland discussion newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  DCOM application server memory grow          BorlandTalk.com Forum Index -> Delphi Databases (Multi-Tier) View previous topic :: View next topic   Author Message Milos Guest Posted: Tue Jun 28, 2005 3:43 pm    Post subject: DCOM application server memory grow Hi all, we have 3-thier application (database<->application server<->clients) using Oracle, BDE and DCOM. Approximately 40 clients. Application server size grows constantly until it frezes . I presume that some memory doesn't get free when clients disconnect from aplication server. I run a simple test just start and stop client application and some memory does not get free on application server (i examine memory with procexp tool). I have checked the server code for any unfree memory (for example: if i would forgot to free some stringlist in try - finally block) but haven't found it. Has anyone had similar expiriance? Regards, Milos Back to top Robert Schieck (TeamB) Guest Posted: Wed Jun 29, 2005 11:31 pm    Post subject: Re: DCOM application server memory grow Milos wrote: Quote: Has anyone had similar expiriance? It has been many years since I did this..... We used midas for it... Are you careful to close your queries and database connections on your middle tier ? hth -- Rob Schieck TeamB Back to top Milos Guest Posted: Thu Jun 30, 2005 8:09 am    Post subject: Re: DCOM application server memory grow Hi, On Application server we have TDataBase property KeepConnection set to True. I'am not sure how remote data module handle threads. Our client is an MDI form (exe) that on stratup connects to application with TDCOMConnection. Forms are fsMDIchild and are located in seperated dll-s. Main client application starts dll-s. So each dll connects to application server. When we close dll or main exe, we have event on destroy datamodule where we iterate through components and if it's TClientDataSet then we close it. So we close all connections on client before destroying it. Does that close querys on application server ? Regards Milos <Robert Schieck (TeamB)> wrote Quote: Milos wrote: Has anyone had similar expiriance? It has been many years since I did this..... We used midas for it... Are you careful to close your queries and database connections on your middle tier ? hth -- Rob Schieck TeamB Back to top Milos Guest Posted: Mon Jul 04, 2005 7:36 am    Post subject: Re: DCOM application server memory grow I have added on destroy remotedatamodule event where I close all querys (TQuery), session (TSession) and connection to database (TDataBase), but the server memory is still growing. <Robert Schieck (TeamB)> wrote Quote: Milos wrote: Has anyone had similar expiriance? It has been many years since I did this..... We used midas for it... Are you careful to close your queries and database connections on your middle tier ? hth -- Rob Schieck TeamB Back to top Robert Schieck (TeamB) Guest Posted: Wed Jul 06, 2005 12:28 pm    Post subject: Re: DCOM application server memory grow Milos wrote: Quote: I have added on destroy remotedatamodule event where I close all querys (TQuery), session (TSession) and connection to database (TDataBase), but the server memory is still growing. I really don't have any other ideas. With the BDE you did have to make sure you commited the transaction, close the queries and close the database connection. IIRC they would have to reboot the midas server every couple of days. -- Rob Schieck TeamB Back to top Paul McKenzie Guest Posted: Thu Jul 14, 2005 1:07 am    Post subject: Re: DCOM application server memory grow Robert Schieck (TeamB) wrote: Quote: Milos wrote: I have added on destroy remotedatamodule event where I close all querys (TQuery), session (TSession) and connection to database (TDataBase), but the server memory is still growing. I really don't have any other ideas. With the BDE you did have to make sure you commited the transaction, close the queries and close the database connection. IIRC they would have to reboot the midas server every couple of days. We had memory issues with our AppServer (D7 development) the memory grew and we received "Out-Of-Memory" exceptions, before all memory was actually used. One of the big fixes was using the D2005 Midas.dll. 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