Date: Thu, 29 Jan 2009 18:39:22 +0300 From: Artem Kuchin <matrix@itlegion.ru> To: Mel <fbsd.questions@rachie.is-a-geek.net> Cc: freebsd-questions@freebsd.org Subject: Re: 6.8 became very slow Message-ID: <4981CDAA.9000001@itlegion.ru> In-Reply-To: <200901290628.50945.fbsd.questions@rachie.is-a-geek.net> References: <498196B8.1060101@itlegion.ru> <200901290628.50945.fbsd.questions@rachie.is-a-geek.net>
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Mel =D0=C9=DB=C5=D4: > On Thursday 29 January 2009 02:44:56 Artem Kuchin wrote: > =20 >> 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= =2E8 >> and the jails are 6.4. >> Also, raid is MIRROR now, not RAID5. >> =20 > > If you had to reinstall, you may have missed a boot loader configuratio= n. I=20 > would investigate how your raid5 went to MIRROR, that would certainly a= ccount=20 > for the high system time if the OS and raid card think differently abou= t the=20 > raid system used. > How you'd go about this, is for someone else to answer. I personally wo= uld=20 > compare daily runs and dmesg's saved from before reinstall with current= =20 > installation. > =20 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
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