Does anyone have experience using 24GB RAM on a 32-bit Linux (+PAE) machine? PAE supports up to 64GB, supposedly with little or no performance overhead (from what I can find from some searches).
Anyone have recent PAE horror or success stories? I've got a 32-bit box (Ubuntu 10.04.1, 2.6.32-25-generic-pae SMP kernel) that appears to be running out of memory. Here's a graph of memory stats from the last month: http://yfrog.com/49birchmemlastmonthp . The box runs a bunch of Java VMs, and does builds of Java software. No one process needs >4GB to itself. It's easy and relatively cheap to just bump up the RAM, and if that should work I won't have to spend time working on the box (ie: moving Java VMs around). Since it has 8GB, it's already taking advantage of PAE. As far as I know, we haven't seen any performance problems, but we haven't specifically been looking for any. More info on the box: * Dell PowerEdge 2900 III * Currently has 8GB RAM installed * Max RAM is 48GB (12 slots, 4GB/slot) * 2x Xeon E5430 quad-core 2.66GHz CPUs (looks like 8 procs to Linux) Thanks, -Adam
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