Overusing 1 CPU - Mailing list pgsql-performance

Hallo all

I have a strange problem here.
I have a pgsql database running on Intel hardware here, it has 8 cores
hyperthreaded so you see 16 cpu's.

This box is basically adle @ the moment as it is still in testing yet
top shows high usage on just 1 of the cores.
mpstat gives the below.
As you can see only cpu 1 is verey bussy, the rest are idle.

Thanx

Mozzi

13:02:19     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal
%guest   %idle
13:02:21     all    4.70    0.00    0.41    1.57    0.00    0.00    0.00
0.00   93.32
13:02:21       0    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21       1   72.68    0.00    5.37   21.46    0.00    0.49    0.00
0.00    0.00
13:02:21       2    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21       3    0.00    0.00    0.51    0.00    0.00    0.00    0.00
0.00   99.49
13:02:21       4    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21       5    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21       6    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21       7    0.00    0.00    0.36    0.00    0.00    0.00    0.00
0.00   99.64
13:02:21       8    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21       9    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21      10    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21      11    0.00    0.00    0.00    1.00    0.00    0.00    0.00
0.00   99.00
13:02:21      12    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
13:02:21      13    0.00    0.00    0.00    2.00    0.00    0.00    0.00
0.00   98.00
13:02:21      14    0.00    0.00    0.51    0.00    0.00    0.00    0.00
0.00   99.49
13:02:21      15    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00

Average:     CPU    %usr   %nice    %sys %iowait    %irq   %soft  %steal
%guest   %idle
Average:     all    4.66    0.00    0.43    1.46    0.00    0.04    0.00
0.00   93.41
Average:       0    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:       1   72.27    0.00    5.47   21.58    0.00    0.59    0.00
0.00    0.10
Average:       2    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:       3    0.10    0.00    0.50    0.00    0.00    0.00    0.00
0.00   99.40
Average:       4    0.10    0.00    0.10    0.00    0.00    0.00    0.00
0.00   99.80
Average:       5    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:       6    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:       7    0.00    0.00    0.10    0.60    0.00    0.00    0.00
0.00   99.30
Average:       8    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:       9    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:      10    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:      11    0.00    0.00    0.00    0.20    0.00    0.00    0.00
0.00   99.80
Average:      12    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00
Average:      13    0.00    0.00    0.10    0.40    0.00    0.00    0.00
0.00   99.50
Average:      14    0.00    0.00    0.50    0.00    0.00    0.00    0.00
0.00   99.50
Average:      15    0.00    0.00    0.00    0.00    0.00    0.00    0.00
0.00  100.00