On Fri, Oct 27, 2023 at 01:45:24PM +0200, Ronald Klop wrote:
Can you run "gstat" or "iostat -x -d 1" to see how busy your disk is?
And how much bandwidth is uses.
when periodic is *not* running, gstat numbers fluctuate between whats
indicated below and all zeros:
dT: 1.011s w: 1.000s
L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name
0 69 0 0 0.0 67 732 0.6 24.3| da0
0 0 0 0 0.0 0 0 0.0 0.0| da0p1
0 0 0 0 0.0 0 0 0.0 0.0| da0p2
0 69 0 0 0.0 67 732 0.6 24.3| da0p3
0 0 0 0 0.0 0 0 0.0 0.0| da0p2.eli
0 69 0 0 0.0 67 732 0.8 24.4| da0p3.eli
# iostat -x -d 1
extended device statistics
device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen %b
da0 15 18 189.4 565.1 47 7 144 27 0 23
pass0 0 0 0.0 0.0 54 0 154 79 0 0
extended device statistics
device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen %b
da0 3 70 172.6 698.0 26 1 129 5 0 33
pass0 0 0 0.0 0.0 0 0 0 0 0 0
extended device statistics
device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen %b
da0 0 0 0.0 0.0 0 0 0 0 0 0
pass0 0 0 0.0 0.0 0 0 0 0 0 0
(then all 0s repeatedly)
When periodic *is* running:
dT: 1.047s w: 1.000s
L(q) ops/s r/s kBps ms/r w/s kBps ms/w %busy Name
2 89 34 138 88.1 54 783 33.9 95.0| da0
0 0 0 0 0.0 0 0 0.0 0.0| da0p1
0 0 0 0 0.0 0 0 0.0 0.0| da0p2
2 89 34 138 88.1 54 783 34.0 95.0| da0p3
0 0 0 0 0.0 0 0 0.0 0.0| da0p2.eli
2 90 35 141 86.3 54 783 34.2 96.9| da0p3.eli
the kBps number varies wildly between 100 and 1200. %busy is 92-102%
# iostat -x -d 1
extended device statistics
device r/s w/s kr/s kw/s ms/r ms/w ms/o ms/t qlen %b
da0 15 18 189.6 564.1 47 7 144 27 10 23
pass0 0 0 0.0 0.0 54 0 154 79 0 0
Numbers vary wildly here, too. I wonder if theres a switch for iostat that lets
it
run for say 1000 seconds then produces an average of the values gathered.
I'll look for one
--
