how to size page file on non-os volume
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From: John John - MVP on 16 Apr 2010 13:27 You should not place the pagefile on a fault tolerant drive, such as RAID-5. Typically writing to fault tolerant drives is slower because of multiple writes to the disks. John Chris wrote: > I might try. With RAID 5 with 5 disks what value will be consider high disk > I/O for following perfmon counters: > > avg. disk queue length and current disk queue length > > Some articles said 1.5 -2 x spindles but some said total spindles +2. Can > you advice? > > Thanks. > > "Andrew Morton" wrote: > >> Chris wrote: >>> We have a Dell PE 2950 with 32 GB RAM, running w2k8 sp2. It has 5 >>> SAS disks and is set as a single RAID 5, with two volumes C and D. >>> C: is for OS and D: is for data. The server is used for flat file >>> server but with heavy export and import one in the morning and one in >>> the afternoon for a couple hours. Whenever this happens the server >>> became very slow, almost non-responding. Those export and import to >>> set to use D:. We have set 33 GB page file on C:. It improved but >>> not much. Still have "lockup". Since the heavy load is on logical >>> volume D: I'm wondering: >>> >>> 1. will it be helpful if I set another page file on D:? Because C: >>> and D: are on the same RAID will it make any difference? >>> >>> 2. If it helps what size will be a good start? D: is at 2 TB. >>> >> If you are sure it is the paging which is slowing it down, could you add a >> separate physical disk drive dedicated to the paging file? >> >> "Optimizing Your Servers' Pagefile Performance": >> http://oreilly.com/pub/a/windows/2004/04/27/pagefile.html >> Notice especially the section "Keeping the Pagefile Separate." >> >> -- >> Andrew >> >> >> . >>
From: DaveMills on 19 Apr 2010 02:17 On Thu, 15 Apr 2010 10:43:02 +0100, "Andrew Morton" <akm(a)in-press.co.uk.invalid> wrote: >Chris wrote: >> We have a Dell PE 2950 with 32 GB RAM, running w2k8 sp2. It has 5 >> SAS disks and is set as a single RAID 5, with two volumes C and D. >> C: is for OS and D: is for data. The server is used for flat file >> server but with heavy export and import one in the morning and one in >> the afternoon for a couple hours. Whenever this happens the server >> became very slow, almost non-responding. Those export and import to >> set to use D:. We have set 33 GB page file on C:. It improved but >> not much. Still have "lockup". Since the heavy load is on logical >> volume D: I'm wondering: >> >> 1. will it be helpful if I set another page file on D:? Because C: >> and D: are on the same RAID will it make any difference? >> >> 2. If it helps what size will be a good start? D: is at 2 TB. >> > >If you are sure it is the paging which is slowing it down, could you add a >separate physical disk drive dedicated to the paging file? This would be a good place to use one of the solid state disks. The page file is only temporary storage and the higher performance would be useful. > >"Optimizing Your Servers' Pagefile Performance": >http://oreilly.com/pub/a/windows/2004/04/27/pagefile.html >Notice especially the section "Keeping the Pagefile Separate." -- Dave Mills There are 10 types of people, those that understand binary and those that don't.
From: Mervyn Zhang [MSFT] on 2 May 2010 23:01
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