Re: fsflush consistently 1 of top 5 processes

The problem on large memory machines that have a lot of RAM in use for file system cache is that all of that RAM must be flushed to disk regularly. Fsflush is the process that does that, and if it is working hard, it uses a lot of cpu time. If you install the SE Toolkit on a large machine like yours, it will almost always have suggestions for you to implement. One of my 1000Es is running 2.3, 8 CPUs, 1 GB RAM, about 18 GB of file systems and the rest as raw database devices. Virtual Adrian's recommendation for it was: "Adrian detected a busy process: Sat May 18 04:05:34 1996 fsflush used 8.8% of a CPU (max 5.0%) fsflush may be using too much CPU time, right now it runs every 10 (tune_t_fsflushr) seconds and checks each page every 60 (autoup) seconds Put the following settings in /etc/system and reboot set tune_t_fsflushr=15 set autoup=120". You can get the SE toolkit at: http://www.sun.com/960301/columns/adrian/se2.5.html Good luck.... Neil P.S. The values recommended for my 2000's and Ultra-Enterprise 4000 were different, but it caught some of the little things that I might have missed. rcline19@server.iadfw.net (Robert J. Cline II) wrote: >I consistently see fsflush as one of the top five processes running. >Why is this? >What should I look at for tuning purposes?