Just a heads up to those who use rsyslog on VPS's, reducing the stack size leads to huge improvements in memory usage!
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The first recorded data is eronous.
Second, the normal settings
Third a 1mb stack size
Fourth 256k stack size.
I tested the stack size of 256k (as apposed to 8M) on a lab box for a good 48hours before deciding it was time to push it out, so it should be stable for most workloads. Don't sue me
No syslog server (even one as amazing as rsyslog) should need more than 100mb of ram.