2015/01/06

"Openindiana very slow" issue

My blog written in japanese.
but I found a google suggest "Openindiana very slow"
Wa?
We all feel Openindiana is slow !?
I found what are problems.
So, I write in broken english.

Default Scheduler = FX


if my memory is correct,
Default scheduler is not TS(Time sharing) on Openindiana.
then , one multithread application be able to use only 1CPU.
check /etc/dispadmin.conf , and

# dispadmin -d TS


to choose time sharing scheduler to default. you can also choose FSS.

slow I/O problem


intel laptop graphics and USB 2.0 are requires more large I/O access.
tune /etc/system parameters for desktop use.

#STREAMS speed up
strmsgsz=262144
strctlsz=262144
#block io
maxphys=262144


you can also tune shared memory allocate , semaphore max ids.

Video playing more smooth


Disable ZFS file level prefetch for smooth video playing.
many small seqencial access cause choke ZFS prefetch.

"contract" hack for speed up


Openindiana on HP Probook 6550b (CPU:Core i3 350M)
can run 4 threads.
multiplie by 3

# prctl -n project.max-contracts -v 12 -r -i project 0


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