Hello to everyone on the list, We are trying to squeeze a bit more speed out of MapInfo/MapBasic.
* We have a number of applications that can take one or two weeks to complete. * We also have the problem of having to build in commit, close all and pack table statements because it appears that as the TAB files grow they get unwieldy and task completion time significantly extends. * We are trying using a memory based disk replicated out of system RAM. Certainly the speed of upload is increased as is the first write to memory when you view full layer. But as applications run, the times do not seem to have improved. Does anyone have any comments or experience with using RAM instead of hard disks on complex applications? * We understand that page table entries (PTEs) may become depleted or fragmented on systems that perform a large number input/output (I/O) actions. When they become completely depleted, the system may show a 'Stop' error and halt. Has anyone had any success tweaking their system to increase the number of PTEs available on the system? * Is MapBasic building extensive heap storage leading to memory fragmentation and how might this be overcome? Is there some Windows tuning parameter, for example working set, that can be changed to hold more of the process in memory? * Is there any way of taking advantage of hyper threading? Or dual processors? Or both? * Can anyone recommend any other approaches? * We're running MapInfo/MapBasic on a 3.2 GHZ P4 processor running on a Epox 4PCA3 motherboard based on the Pentium 875 chip set. There is 2 GB of DDR 400 RAM and 4 Seagate Barracuda 160 GB drives in a zero/one raid array using a promise S150 T X 4 PCI Controller. Does anyone have any comments on this setup? Is there a better way to setup for MapInfo in this type of price range? I'd be really interested to hear of other people's experience with this and any thoughts you guys might have. Cheers Percy __________________________________ Percy Bell Communications Research Unit Department of Communications, IT and the Arts Ph. (02) 6271 1463 Fax.(02) 6271 1717 GPO Box 2154, Canberra ACT 2601 mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> http://www.dcita.gov.au <http://www.dcita.gov.au> _________________________________________________________________________ The information transmitted is for the use of the intended recipient only and may contain confidential and/or legally privileged material. Any review, re-transmission, disclosure, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited and may result in severe penalties. If you have received this e-mail in error please notify the Security Advisor of the Department of Communications, Information Technology and the Arts, telephone (02) 6271-1880 and delete all copies of this transmission together with any attachments. _________________________________________________________________________
