41 lines
1.8 KiB
MySQL
41 lines
1.8 KiB
MySQL
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-- +----------------------------------------------------------------------------+
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-- | Jeffrey M. Hunter |
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-- | jhunter@idevelopment.info |
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-- | www.idevelopment.info |
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-- |----------------------------------------------------------------------------|
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-- | Copyright (c) 1998-2011 Jeffrey M. Hunter. All rights reserved. |
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-- |----------------------------------------------------------------------------|
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-- | DATABASE : Oracle |
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-- | FILE : perf_db_block_buffer_usage.sql |
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-- | CLASS : Tuning |
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-- | PURPOSE : Report on the state of all DB_BLOCK_BUFFERS. This script must |
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-- | be run as the SYS user. |
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-- | NOTE : As with any code, ensure to test this script in a development |
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-- | environment before attempting to run it in production. |
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-- +----------------------------------------------------------------------------+
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SET LINESIZE 135
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SET PAGESIZE 9999
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SET VERIFY off
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COLUMN block_status HEADING "Block Status"
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COLUMN count HEADING "Count"
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SELECT
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DECODE(state, 0, 'Free',
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1, DECODE(lrba_seq, 0, 'Available', 'Being Modified'),
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2, 'Not Modified',
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3, 'Being Read',
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'Other') block_status
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, count(*) count
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FROM
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sys.x$bh
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GROUP BY
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DECODE(state, 0, 'Free',
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1, DECODE(lrba_seq, 0, 'Available', 'Being Modified'),
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2, 'Not Modified',
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3, 'Being Read',
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'Other')
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/
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