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Get an i7 :P

Earliest next year February, when the old contract is running out

Sadly yes.
1 CPU core 100% busy.
No waiting time for IO. Disk is not that busy, when in replay.
At least that what nmon shows and I trust nmon.
The only slow factor seems the CPU.
( I have SSDs in my node)

model : 79 model name : Intel(R) Xeon(R) CPU E5-2630 v4 @ 2.20GHz stepping : 1 microcode : 0x1 cpu MHz : 2199.998 cache size : 16384 KB

The replay is mostly single threaded, so cores won't make a big difference but the speed of the core is critical.

How much ram?