Upgrading is simply not an option. It all comes down to having the engineering staff, money, and downtime available. Unfortunatly, we have none of the above right now. I realize we *need* to upgrade, but right now, tuning the kernel is the only option.
I would be extremely greatful if anyone out there able to provide the requested information. :-) Tristin On Thu, Jun 14, 2012 at 11:52 AM, Chris Zakelj <c.zak...@ieee.org> wrote: > 1. Any particular reason your systems have not been updated in at least > three years? > 2. Kernel defaults are generally chosen for a reason. Unless you have > evidence of resource exhaustion, turning knobs generally won't make things > better, and could make them worse. > > On Thu, Jun 14, 2012 at 12:31 PM, Tristin Davis > <tristin.co...@gmail.com>wrote: > >> Hardware Type: Intel >> Version: OpenBSD 4.3 >> Kernel: MP >> >> >> I am currently researching some tweaks to increase our network throughput >> on a production server. I have found 3 parameters that I may be interested >> in changing our systems. I have researched and searched google for >> information and impact for the parameters to with little success. What I >> am looking for is an idea of what long term impact of changing these >> parameters and an explicit description of what the modification of each >> kernel parameter will do. These are production sftp servers with a large >> number of connections that are rarely rebooted so it is very important >> that >> changing these values not cause the system to run out of memory. Can >> anyone help with the descriptions and possible reprecussions of each of >> these parameters? >> >> >> kern.bufcachepercent=90 # Allow the kernel to use up to 90% of the >> RAM for cache (default 10%) <-- Suposally not changable via sysctl >> kern.maxclusters=128000 # Cluster allocation limit >> net.bpf.bufsize=1048576 # Internal kernel buffer for storing packet >> captured packets received from the network >> >> >> Thank you in advance, >> >> Tristin
