James, >Date: Mon, 24 Oct 2005 12:07:42 -0500 >From: James Esslinger <address@hidden> >To: Steve Emmerson <address@hidden> >Subject: Re: 20051012: ernie.tamu.edu is getting unstable... The above message contained the following: > Hopefully you have tracked down the cause, I haven't tracked down the cause. If anything, I've only discovered that the problem is associated with support for large product-queues. The cause could still be the software, operating-system, or hardware. The difference between the current LDM on Ernie and one that supports large product-queues is how the product-queue module handles memory-mapping. If a large product-queue isn't possible, then the module maps the entire product-queue only once. When supporting large product-queues, however, the module separately maps each region in the file when the data of data-product is stored, which means that mapping occurs many times per second. Regards, Steve Emmerson
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