Re: bad performance

2002-11-20 21:55:40, Fabian Duelli wrote:
>
>hello

What you want to determine is where the bottleneck is. You've mentioned two tests here, FTP and NFS. Both of them involve disk and network operations. So, you should come up with tests that isolate the two subsystems to see where the 1.5MB/s is coming from.

For the fs, just dd(1) the file a few times to /dev/null with a reasonable block size and see how it performs. For the network, well, try ftp'ing from a memory filesystem. That'll give you much more insight into where the performance limitations are.

Also, keep in mind that increasing the number of bufpages may not help ftpd as it mmap(2)s the file and OpenBSD does not have UBC. In fact, increasing BUFCACHEPERCENT to 80 may be actively hurting ftpd.

--
    Roland Dowdeswell                      
http://www.Imrryr.ORG/~elric/