On Sun, 26 Sept 2021 at 01:44, Tim via users <users@lists.fedoraproject.org> wrote:
> On Sat, 2021-09-25 at 06:04 +0100, Terry Barnaby wrote: > > in the last month or so all of the client computers are getting KDE > > GUI lockups every few hours that last for around 40 secs. > > Might one of them have a cron job that's scouring the network? > > e.g. locate databasing > If you have cron jobs that use a lot of network bandwidth it may work fine until some network issue causing lots of retransmits bogs it down. "netstat -i <interface>" will have non-zero values for X-DRP, X-ERR, and/or X-OVR. In the good old days, one bad patch cable might affect the workstation (and user would say "network is fine"), but now one laptop can shovel packets fast enough to bring down a network. At my former work we had smart switches that would cut off a workstation using excessive bandwidth. SGI workstations processing "large" data sets were given an exemption, but after every update to the switches we had to remind IT to reconnect the SGI boxes. IT did have very fancy software that could show where the LAN was conjested, but generally nobody looked at it unless users reported problems. I had cron jobs that generated daily reports for each workstation in our group, including netstat. Bad cables were causing enough downlime that IT banned use of cables old cables and provided new high quality cables for all (our environment was hard on cables due to users going to sea, so exposing cables to high vibration and humidity seasoned with salt). -- George N. White III
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