RE: IDS 7.31 memory limits in Windows 2000

Hi, Juvier, I saw a reply to You message that " in a 32 bit Informix version, you can not malloc memory exceed 2G" This is not quite true. Informix doesn't allocate with 'malloc'. Instead, it allocates with 'shmget'. With properly tuned 32-bit Linux, You can allocate almost 3 GB to Informix (3 shared memory segments, each below 1 GB) I didn't try large-memory Windows installations. I think the following extract from MS doc's might help You: "Standard 32-bit addresses can map a maximum of 4 GB of memory. The standard address spaces of 32-bit Microsoft Windows NT' 4.0 and Windows 2000 processes are therefore limited to 4-GB. By default, 2 GB is reserved for the operating system, and 2 GB is made available to the application. If you specify a /3GB switch in the Boot.ini file of Windows NT Enterprise Edition or Windows 2000 Advanced Server, the operating system reserves only 1 GB of the address space, and the application can access up to 3 GB. For more information about the /3GB switch, see Windows NT Enterprise Edition or Windows 2000 Advanced Server Help." ------------------------------------------ Alexey Sonkin Senior Database Administrator > -----Original Message----- > From: Javier P'rez Arenal [mailto:jperez@uniovi.es] > Sent: Friday, October 24, 2003 6:53 AM > To: informix-list@iiug.org > Subject: IDS 7.31 memory limits in Windows 2000 > > > Hello! > > I have one IDS 7.31 instance running in a Xeon bi-processor with > Windows 2000 Server installed (for test purposes). The databases are > copied regularly from out production environment (IDS 7.31 - AIX 4.3.3). > > The W2K Server have 4 Gb RAM memory but I can't assign more than 1,5 > Gb > (aprox.) to the oninit process. I have seen other installations of IDS > in other OS and normally, have varios oninit processes running. In > Windows there's only one, and I think that the trouble in this case is > the amount of memory that one process can manage in Win32. > > Anybody knows any way to assign more memory to my IDS instance??. I > need to increase my bufferpool. > > Please, send your answers to my private e-mail too. > > Thanks in advance. > > PD: Excuse me if my english is not good :( > > -- > Javier Perez Arenal - jperez@uniovi.es > Unidad de Calidad. Servicio de Informatica > Universidad de Oviedo. Espa'a > Tfno: +34 8 510 30 68 sending to informix-list