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 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
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