doug@ICASE.ARPA.UUCP (06/03/88)
My apologies if this is posted to the wrong discussion group. We have just upgraded our server from a 3/180 to a 3/280, and have seen a DECREASE in performance. We run Sun OS 3.5. The number of diskless clients in both cases is the same. The e-net collision rate is much higher with the new server, which may account for some of the decrease. But I just received my copy of the May Sun STB, which has an article describing how the cache works on a Sun 3/200 series machine. On page 826, there is a statement to the effect that if the cache hit rate is effectively zero, then performance of a 3/280 system will be less than a 3/280. As a server, handling lots of random client requests, I would think that the cache hit rate would be very low. Has anyone observed similar phenomenon? I will summarize to the net. Doug Peterson Systems Manager ICASE Mail Stop 132C NASA Langley Research Center Hampton, VA 23665-5225 (804) 865-4090 ----- End Forwarded Message -----