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[LDM #QYR-744357]: increase Q size
- Subject: [LDM #QYR-744357]: increase Q size
- Date: Fri, 27 Jul 2012 12:36:29 -0600
Virginia,
> So LDM is mapping of LDM Q file to Memory ?
Yup. Later version memory-map the product-queue better than earlier versions.
> I'm unclear how an LDM upgrade would work around the mmap restrictions on
> 32 bit system.
> But are you saying we could try LDM upgrade to 6..9.8 or later that would
> allow us to work around any restrictions in mapping?
Later versions of the LDM allow you to obtain as large a product-queue as is
possible on the system in question. The actual limit depends on the
"programming environments" that are available. Some 32-bit systems nevertheless
support large files (files larger than 4 GB).
> We could add more memory over 4GB -- but then I am told we are facing
> system limit on recognition of the new Memory that would mean a kernal
> patch.
>
> We are building 64 bit replacements but right now we just want to reduce
> latency on these old systems. Two upstream feeders have 4GB queues and we
> think that increasing our queues to match would reduce latency.
I don't think a larger queue will reduce latency, which is the difference in
time between when a product is created and when it arrives.
> Thanks
> Virginia
Regards,
Steve Emmerson
Ticket Details
===================
Ticket ID: QYR-744357
Department: Support LDM
Priority: Normal
Status: Closed