From: | Emil Briggs <emil(at)baymountain(dot)com> |
---|---|
To: | pgsql-performance(at)postgresql(dot)org |
Subject: | Re: Indexes on ramdisk |
Date: | 2005-10-05 03:41:23 |
Message-ID: | 200510042341.23264.emil@baymountain.com |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-performance |
> Talk about your IO system a bit. There might be obvious ways to improve.
>
> What System/Motherboard are you using?
> What Controller Cards are you using?
> What kind of Disks do you have (SATA, SCSI 7.6k 10k 15k)
> What denominations (9, 18, 36, 72, 143, 80, 160, 200 240Gig)?
> What kind of RAIDs do you have setup (How many drives what stripe sizes,
> how many used for what).
> What levels of RAID are you using (0,1,10,5,50)?
>
It's a quad opteron system. RAID controller is a 4 channel LSILogic Megaraid
320 connected to 10 15k 36.7G SCSI disks. The disks are configured in 5
mirrored partitions. The pg_xlog is on one mirror and the data and indexes
are spread over the other 4 using tablespaces. These numbers from
pg_stat_user_tables are from about 2 hours earlier today on this one table.
idx_scan 20578690
idx_tup_fetch 35866104841
n_tup_ins 1940081
n_tup_upd 1604041
n_tup_del 1880424
From | Date | Subject | |
---|---|---|---|
Next Message | Steve Atkins | 2005-10-05 03:50:13 | Re: Is There Any Way .... |
Previous Message | Alex Turner | 2005-10-05 03:23:17 | Re: Indexes on ramdisk |