Experimental Physics and Industrial Control System
Hi Dirk--
Dirk Zimoch wrote:
I tried to tune the network buffers. But once I when I saw with
inetstatShow that send queues filled up, I increased their size from the
default 8k to 64k. This seems to be a bad decision, because now I don't
have enough mbufs any more.
Were you tuning to address a particular problem you were experiencing?
In the scenario you described where the server had a full send queue
and multiple clients had large receive queues, increasing the queue
size is unlikely to help much. At best, it may just slightly delay
the inevitable (or starve the server of resources first).
I would be more curious as to what was happening (client, server,
network) that led to this peculiar situation. (One end of the
connection briefly queuing up is not unusual for a busy system, but
both ends seems strange.)
It was user shift, so hopefully nobody had unplugged any cables.
Could still be a flaky edge network switch. Or something unrelated.
Probably ca_search UDP packages are related, but the time resolution of
our network diagnosis is not so good that I can see if the IOC crashes
because of search broadcasts or if the clients broadcast because the IOC
crashed.
I would guess the search broadcasts were the result of the IOC
crash, not the cause.
--
Steven Hartman
[email protected]
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- vxWorks network problems Dirk Zimoch
- Re: vxWorks network problems Steven M. Hartman
- Re: vxWorks network problems Dirk Zimoch
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