[Q] Why is I/O so poor on my Alpha?

From: Susan Rodriguez <SUSROD_at_HBSI.COM>
Date: Thu, 07 Oct 1999 08:40:53 -0700

Here is my configuration:

DEC Alpha 4100
        - Digital Unix 4.0d patch kit 3
        - 4 CPUs 500MHz
        - 4 GB RAM
        - Swap at 8 GB in overcommit mode
        - 300 GB disk (EMC fast-wide in RAID 5 config)

Filesystem
        UFS
        Using LSM to stripe fs's across 4 controllers

Kernel
        maxusers 1024
        max-proc-per-user = 2048
        max-threads-per-user = 2048
        max-per-proc-stack-size = 33554432
        max-per-proc-data-size = 3221225472
        max-per-proc-address-space = 3221225472
        vm-maxvas = 2147483648
        ubc-minpercent 30%



My problem:

Creating new oracle tablespaces is incredibly slow. This could be something
set inside oracle, but where else might I look on my side for an I/O
bottleneck? I run iostat and volstat, but don't find the results very
meaningful.

I keep thinking I must be missing something in the kernel, but I don't see
what it is.

Any ideas?

I will summarize. Thanks.

susrod_at_hbsi.com

> -----Original Message-----
> From: Carol Duncan
> Sent: Wednesday, October 06, 1999 7:59 PM
> To: Susan Rodriguez; Karson Cheung
> Cc: Carol Duncan
> Subject: ts status
>
> it took 1hr 8min to create datafiles with total size of 14G for 1
> tablespace
>
> fyi--
> carol
Received on Thu Oct 07 1999 - 15:39:55 NZDT

This archive was generated by hypermail 2.4.0 : Wed Nov 08 2023 - 11:53:39 NZDT