Re: Proposal of tunable fix for scalability of 8.4

decibel wrote:
> On Mar 13, 2009, at 3:02 PM, Jignesh K. Shah wrote:
>> vmstat seems similar to wakeup some
>> kthr      memory            page            disk          faults
>> cpu
>> r b w   swap  free  re  mf pi po fr de sr s0 s1 s2 sd   in   sy   cs
>> us sy id
>> 63 0 0 45535728 38689856 0 14 0 0 0  0  0  0  0  0  0 163318 334225
>> 360179 47 17 36
>> 85 0 0 45436736 38690760 0 6 0 0  0  0  0  0  0  0  0 165536 347462
>> 365987 47 17 36
>> 59 0 0 45405184 38681752 0 11 0 0 0  0  0  0  0  0  0 155153 326182
>> 345527 47 16 37
>> 53 0 0 45393816 38673344 0 6 0 0  0  0  0  0  0  0  0 152752 317851
>> 340737 47 16 37
>> 66 0 0 45378312 38651920 0 11 0 0 0  0  0  0  0  0  0 150979 304350
>> 336915 47 16 38
>> 67 0 0 45489520 38639664 0 5 0 0  0  0  0  0  0  0  0 157188 318958
>> 351905 47 16 37
>> 82 0 0 45483600 38633344 0 10 0 0 0  0  0  0  0  0  0 168797 348619
>> 375827 47 17 36
>> 68 0 0 45463008 38614432 0 9 0 0  0  0  0  0  0  0  0 173020 376594
>> 385370 47 18 35
>> 54 0 0 45451376 38603792 0 13 0 0 0  0  0  0  0  0  0 161891 342522
>> 364286 48 17 35
>> 41 0 0 45356544 38605976 0 5 0 0  0  0  0  0  0  0  0 167250 358320
>> 372469 47 17 36
>> 27 0 0 45323472 38596952 0 11 0 0 0  0  0  0  0  0  0 165099 344695
>> 364256 48 17 35
>
>
> The good news is there's now at least enough runnable procs. What I
> find *extremely* odd is the CPU usage is almost dead constant...
Generally when there is dead constant.. signs of classic bottleneck ;-)
We will be fixing one to get to another.. but knocking bottlenecks is
the name of the game I think

-Jignesh

--
Jignesh Shah           http://blogs.sun.com/jkshah
The New Sun Microsystems,Inc   http://sun.com/postgresql