Greetings, On Sat, Jan 28, 2012 at 12:51 PM, Jayashankar K B <Jayashankar.KB@xxxxxxxxxx> wrote: > Hi, > > I downloaded the source code and cross compiled it into a relocatable package and copied it to the device. > LTIB was the cross-compile tool chain that was used. Controller is coldfire MCF54418 CPU. > Here is the configure options I used. Ok, no floating point, and just ~250MHz... small. Anyway, lets not talk about hardware options, because you already have it. About kernel, I'm not sure if on this arch you have the option, but did you enable "PREEMPT" kernel config option? (on menuconfig: "Preemptible Kernel (Low-Latency Desktop)").... Or, is that a RT kernel? With such a small CPU, almost any DB engine you put there will be CPU-hungry, but if your CPU usage is under 95%, you know you still have some CPU to spare, on the other hand, if you are 100% CPU, you have to evaluate required response time, and set priorities accordingly.. However, I have found that, even with processes with nice level 19 using 100% CPU, other nice level 0 processes will slow-down unless I set PREEMPT option to on kernel compile options (other issue are IO wait times, at least on my application that uses CF can get quite high). Sincerely, Ildefonso Camargo -- Sent via pgsql-performance mailing list (pgsql-performance@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-performance
