On Sun, 7 Feb 1999, David J N Begley wrote: > Have you dared give async-I/O a try? > Ah yes. Async IO. My average CPU useage increased noticeably when I enabled it. For the request rate I'm seeing [peaks of 30/sec on average] I needed to configure NUMTHREADS to be 64 in aiops.c before it wouldn't moan about running out on a regular basis. The effect on performance seems minimal when the system is not stressed. However I have noticed a lot fewer peaks of bad performance (as monitored by a periodic fetch and reload through the cache) than with async IO switched off. Therefore for me it's a net win at the moment. If I was to become CPU limited, it might not be. Just my experiences. Anyone else have any worth sharing? John
