Hardware Bottleneck
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Is there an easy way to determine if my hardware is slowing/blocking my connection?
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Is the CPU at 100%?
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No, nor is memory. Just wondering if the NIC cards or some other aspect of the hardware is slowing the system.
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Well, you haven't told us anything about your hardware, network, or configuration.
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If something goes to NIC bottleneck then check:
1. number of interrupts
2. hardware bottleneck itself (eg. PCI-Ex x4 NIC in PCI-Ex x1 slot)
3. offload engines available to NIC
4. CPU/RAM/memory load under stressWe hit 100/100Mbit bottleneck in pfSense VM, causing OS hung, we had to tweak it little..
But there are more aspects than You think, eg.
1. switch bottleneck (Gigabit doesn't means Gigabit, look into packets-per-second nad throughput of the switch)
2. CRC errors on interface or duplex missconfig
3. spanning tree rebuilding
4. and more.. -
Thank you for the suggestions.
I don't have a specific problem. I am looking to learn what to look for. It seems there is a lot of art and little science in science in sizing a system. It's understandable as every situation is so unique. How much load an IPSEC tunnel creates vs OpenVPN or which packages are running.