CPU Time slices, technotes.
This is a multi-part message in MIME format. ------=_NextPart_000_0061_01BE5B41.8344F950 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable A few days ago I saw a message by Art S. Kagel. It mentioned changing = some kernal parameters to change timeslice to improve performance. = Could anyone tell me where I can dig this information up? Thank you david.tamburin@protegrity.com ------=_NextPart_000_0061_01BE5B41.8344F950 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable <!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN"> <HTML> <HEAD> <META content=3Dtext/html;charset=3Diso-8859-1 = http-equiv=3DContent-Type> <META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR> </HEAD> <BODY bgColor=3D#ffffff> <DIV><FONT color=3D#000000 size=3D2>A few days ago I saw a message by = Art S.=20 Kagel. It mentioned changing some kernal parameters to change = timeslice to=20 improve performance. Could anyone tell me where I can dig this = information=20 up?</FONT></DIV> <DIV><FONT color=3D#000000 size=3D2>Thank you</FONT></DIV> <DIV><FONT color=3D#000000=20 size=3D2>david.tamburin@protegrity.com</FONT></DIV></BODY></HTML> ------=_NextPart_000_0061_01BE5B41.8344F950--
David Tamburin wrote: > > This is a multi-part message in MIME format. > A few days ago I saw a message by Art S. Kagel. It mentioned changing > some kernal parameters to change timeslice to improve performance. > Could anyone tell me where I can dig this information up? OK Here are the Kernel parameters to adjust the Solaris system clock and timeslice down form the default 1/10 sec to 1ms. In /etc/system: set hires_tick=1 # or 2 - Number of system ticks per timeslice- 1 ms set hires_hz=1000 # Number of system ticks per second, ie set to ms Without this change you will be hard pressed to push the machine beyond about 65% utilization. After the change you can add processes and push utilization above 92%! Art S. Kagel
Hallo, I believe that the hires_tick and hires_hz parameters are part of Solaris 2.6. Which parameters are to be set for Solaris 2.5.1. Regards, Albert Wisse "Art S. Kagel" wrote: > David Tamburin wrote: > > > > This is a multi-part message in MIME format. > > > A few days ago I saw a message by Art S. Kagel. It mentioned changing > > some kernal parameters to change timeslice to improve performance. > > Could anyone tell me where I can dig this information up? > > OK Here are the Kernel parameters to adjust the Solaris system clock > and timeslice down form the default 1/10 sec to 1ms. In /etc/system: > > set hires_tick=1 # or 2 - Number of system ticks per timeslice- 1 ms > set hires_hz=1000 # Number of system ticks per second, ie set to ms > > Without this change you will be hard pressed to push the machine > beyond about 65% utilization. After the change you can add processes > and push utilization above 92%! > > Art S. Kagel