On Wed, 2007-07-11 at 12:43 +0000, Rick Truett wrote: > I have gotten a number of performance monitor questions. > > I will get some VM Monitor information on channels and disk performance and > feed this back. > > How can I discover where in lvscan I am spending my time? >
One idea is to remove the VG from the startup sequence, then run lvscan manually after boot. You could comment the line from fstab (and chkconfig off any services needing the LVM) and reboot. When it comes up, you can run lvscan manually. -Brad > What I can answer at the moment is; The Linux guest has 3 IFLs on a z9 > processor with no other tasks using the IFLs during this boot time. I've VM > Perf Toolkit and TeamQuest installed. > > THANK YOU FOR YOU HELP > > -------------- Original message -------------- > From: Dave Jones <[EMAIL PROTECTED]> > > > Hi, Rick. > > > > Can you provide any more detailed information about this problem? You > > already know that it appears to be in the lvscan process, but can we > > find out *where* in the lvscan processing the time is being spent? Is > > the Linux virtual machine getting enough resources at boot time? How > > loaded are the channels to these volumes? > > > > This is an example of where having a good VM and Linux performance > > monitor could be very useful. > > > > Have a good one. > > > > Rick Truett wrote: > > > Hello; Here is the environment: > > > > > > z/VM 5.2, RHEL 4, LVM2 with fullpack 3390-9 mini-disks EXT3 filesystems. > > > There are 4 lvgroups each with ~130 volumes (give or take a few). > > > > > > Issue: On boot of the Linux system it takes upward to 80 minutes to open > > > the LVM filesystems. Most of the time is in lvscan processing. > > > > > > Is there anything we can look at to speed up this boot performance? > > > > > > > > > Thank you > > > > > > ---------------------------------------------------------------------- > > > For LINUX-390 subscribe / signoff / archive access instructions, > > > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit > > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > > > -- > > DJ > > V/Soft > > > > ---------------------------------------------------------------------- > > For LINUX-390 subscribe / signoff / archive access instructions, > > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit > > http://www.marist.edu/htbin/wlvindex?LINUX-390 > > ---------------------------------------------------------------------- > For LINUX-390 subscribe / signoff / archive access instructions, > send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit > http://www.marist.edu/htbin/wlvindex?LINUX-390 -- Brad Hinson <[EMAIL PROTECTED]> Technical Account Manager Red Hat, Inc. (888) 733-4281 x44198 ---------------------------------------------------------------------- For LINUX-390 subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: INFO LINUX-390 or visit http://www.marist.edu/htbin/wlvindex?LINUX-390
