Re: KAIO vps, and bufwaits

In article <886809059.4858.0.nnrp-02.9e982eb2@news.demon.co.uk>, Tony Tyrwhitt-Drake <tonytd@ttyrwhit.demon.co.uk> writes > >Neil Truby wrote in message <34DB88BE.56A3@netcomuk.co.uk>... >>Does anyone know how to set up extra KAIO vps? > > >The KAIO bits are connected to the CPU vp bits. If you add another CPU vp >you will appear to get an extra "KAIO vp" although I think you'll find it is >actually part of the CPU vp. > Correct, it is a kaio thread not vp!! >>Also, despite having 200M of BUFFERS, onstat -p is still showing some >>bufwaits. The read cache rate is above 99%, but the write remains >>around 87% - the same as on the Sparc when BUFFERS was set to 50M. The >>new system isn't swapping and hardly pages; do the bufwaits suggest a >>further increase in BUFFERS is warranted? > >The bufwaits may be there as a result of checkpoint activity. Your write >cache rate will depend on what program code you are running. If applications >are doing mostly updates the cache rate will climb and with mostly inserts >it will fall. You can't do a lot about it so I wouldn't worry too much. >If you have the physical memory, more BUFFERS is hardly ever a bad >idea...but if the thing is performing OK and the punters are happy, leave it >as it is. > > > -- David Williams Maintainer of the Informix FAQ Primary site (Beta Version) http://www.smooth1.demon.co.uk Official site http://www.iiug.org/techinfo/faq/faq_top.html I see you standin', Standin' on your own, It's such a lonely place for you, For you to be If you need a shoulder, Or if you need a friend, I'll be here standing, Until the bitter end... So don't chastise me Or think I, I mean you harm... All I ever wanted Was for you To know that I care