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
