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Re: Slow Apt
Other networking is mostly perfect. Once in a while I'll get a
spot where it is uploading or downloading and it pauses for a sec
or two. Other than apt, everything seems to run normal speed.
I do have one DomU that runs fast except when it serves web
pages, but I think that is a different issue. The web pages are
being built from a database and I think the database performance
is slow. Its working, so I put that on the back-burner for now.
Only 3 DomU's running on this server and they are <1% busy at
any given time.
I've seen this happen at least 3 other
times with Buster and Apt on Xen.
On 6/14/21 1:44 PM, Chris Myers wrote:
Interesting...a
wait of 10% isn't great but isn't horrible either, I wouldn't
see that as a cause of delays like that. (I recently had
issues with a "new" board that had a lot of "steal" even when
basically doing nothing, so I was curious if you were running
into that too.)
Other
than "apt" commands, how do other network-based tasks look?
I
upgraded from Stretch to Buster a year or so ago and haven't
run into this so far.
Other
than apt commands, how does everything look?
Hovers around 10.5 wa and 0.2 to 0.3 in st.
Top processes are vifs with a loop4 popping up to the top
once in a while along with rcu_sched.
I would guess the loop4 is the mounted disk image for the
DomU.
So, after the 'apt-get update' finished, the wa dropped to
0.4 and st stayed at 0.2
On 6/10/21 4:29 PM, Chris Myers wrote:
Out of curiosity, how does "top" look when
it's running? Especially things like "wa" (IOWait) and
"st" (steal)?
First, hello. New
to the list, but I've been using Xen Hypervisor for a
long time.
I'm curious if anyone else has had this issue.
I recently upgraded a server from Debian Squeeze to
Buster with kernel
4.19.0-16-amd64 and found that apt/aptitude commands
are slow in response.
For example, 'apt-get update' can take 10 minutes to
complete, hanging
up on certain parts of the downloads either at 0% or
90%. This is
something that normally takes a few seconds.
Even the DomU's suffer the same issue.
On another server I have kernel 4.19.0-14-amd64 and it
seems to be
running just fine most of the time. I do get some
hiccups, but not
nearly as much as the above upgraded server.
I've also noticed that writes will sometimes pause for
several seconds,
specially when transferring large files.
Setup:
E3-1230 V2 @ 3.30GHz
16 GB RAM
Hard drives are spinning disk. 2 TB drives (EXT4)
DomUs are using Disk.Img for their disk.
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