6.8 became very slow

[Artem Kuchin]

Mel пишет:
> On Thursday 29 January 2009 02:44:56 Artem Kuchin wrote:
>   
>> I have  a very strange situation here. There was a hosting box with 5
>> jails.
>> Everything is 6.4
>> It was running twe driver with RAID 5.
>>
>> Then i had a crash and had to reinstall the system.
>>
>> So, i have installed FREEBSD 6.8, cvsed the latest, rebuilt everything
>> and then
>> just copied jails from the prev installation. So, the host system is 6.8
>> and the jails are 6.4.
>> Also, raid is MIRROR now, not RAID5.
>>     
>
> If you had to reinstall, you may have missed a boot loader configuration. I 
> would investigate how your raid5 went to MIRROR, that would certainly account 
> for the high system time if the OS and raid card think differently about the 
> raid system used.
> How you'd go about this, is for someone else to answer. I personally would 
> compare daily runs and dmesg's saved from before reinstall with current 
> installation.
>   
I am sure this is not the case because the new raid was simply recreated 
manually using 3ware bios and
then freebsd installed and then old data copied from backup.


BTW, here are the interrupts:
interrupt                          total       rate
irq14: ata0                           47          0
irq15: ata1                      4818547          3
irq28: em0                     137807398        105
irq72: twe0                     66970618         51
cpu0: timer                   2606991398       2000
cpu1: timer                   2596549865       1992
cpu2: timer                   2606991199       2000
cpu3: timer                   2596549863       1992
Total                        10616678935       8145

And here is vmstat -i output from another box running 7.1

interrupt                          total       rate
irq1: atkbd0                        1478          0
irq6: fdc0                             1          0
irq14: ata0                           69          0
irq17: pcm0 twe0                37631996         27
irq21: fxp0                     30360322         21
irq22: fxp1                        86882          0
irq23: rl0                      31359763         22
cpu0: timer                    556023401        399
cpu1: timer                    557037363        399
Total                         1212501275        870


So, this 6.4 gets 9 times more interrupts (mostly timer).
Is is okay?

--
Artem