I know that at least mine is on a V-disk (don't tell Richard! :), so that's not a part the problem I'm seeing. From what Richard said, they've been seeing this on lots of systems, and they've been working with Boeblingen trying to figure it out. Hopefully they will, because it's extremely irritating when I'm trying to type stuff and things just pause for a random time interval.
Mark Post -----Original Message----- From: Alan Altmark [mailto:[EMAIL PROTECTED] Sent: Wednesday, October 15, 2003 5:38 PM To: [EMAIL PROTECTED] Subject: Re: z/VM 4.4 guestlan problems On Wednesday, 10/15/2003 at 04:51 AST, "Post, Mark K" <[EMAIL PROTECTED]> wrote: > There are definitely some problems in this area, but I'm not sure how to > isolate them. The folks that run the LCDS seem to think it is with the > qeth/qdio Linux/390 drivers. I see symptoms very similar to what you're > seeing. Random, moderately frequent network "freezes" that clear themselves > anywhere from 1 to 20+ seconds (or more?). One thing to watch is to ensure that log/swap volumes of very active servers are not on the same dasd volume. I have seen a case where multiple SAMBA servers came to random "stalls" due to contention on the volume. (The swap files were on same volume.) Remember that only one physical I/O can be outstanding on a single disk volume at one time. (In fact, swap files should probably be on vdisks.) Alan Altmark Sr. Software Engineer IBM z/VM Development
