[CentOS] Any way to reduce CPU use of OpenSSH?
Florin Andrei
florin at andrei.myip.orgMon Dec 15 22:53:52 UTC 2008
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Steve Snyder wrote: > On my CentOS v5.2 server (dual Pentium4) the OpenSSH daemon stands out > as being the most CPU-intensive of the Wow, you must be sending terabytes of stuff through ssh. :-) Assuming the request is legit: 1. Disable compression if you don't need it. 2. Try another crypto protocol. Years ago, when this problem was real :-) (sorry, no offense), I used to force blowfish instead of whatever crypto was default back then, and it produced a significant decrease of CPU usage on those Pentium II processors. ssh -c blowfish-cbc hostname I don't know which protocol is fastest nowadays, but I guess you can do a quick test and find out. There might be some security implications for using a different crypto protocol, but you need to figure that out yourself. -- Florin Andrei http://florin.myip.org/
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