50 lines
1.5 KiB
SQL
50 lines
1.5 KiB
SQL
-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
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-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
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--------------------------------------------------------------------------------
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--
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-- File name: bhla.sql (Buffer Headers by Latch Address)
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-- Purpose: Report which blocks are in buffer cache, protected by a cache
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-- buffers chains child latch
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--
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-- Author: Tanel Poder
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-- Copyright: (c) http://www.tanelpoder.com
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--
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-- Usage: @bhla <child latch address>
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-- @bhla 27E5A780
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--
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--
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-- Other: This script reports all buffers "under" the given cache buffers
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-- chains child latch, their corresponding segment names and
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-- touch counts (TCH).
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--
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--------------------------------------------------------------------------------
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col bhla_object head object for a40 truncate
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col bhla_DBA head DBA for a20
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col bhla_obj head OBJ for 99999999999
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WITH bclass AS (SELECT class, ROWNUM id from v$waitstat)
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select /*+ LEADING(bh) */
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bh.obj bhla_obj,
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o.object_type,
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o.owner||'.'||o.object_name bhla_object,
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bclass.class,
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bh.tch,
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file# ||' '||dbablk bhla_DBA,
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bh.state,
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bh.mode_held,
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bh.dirty_queue DQ,
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trim(to_char(bh.flag, 'XXXXXXXX')) ||':'||trim(to_char(bh.lru_flag, 'XXXXXXXX')) flg_lruflg
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from
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x$bh bh,
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dba_objects o,
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bclass
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where
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bh.obj = o.data_object_id
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and bh.class = bclass.id (+)
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and hladdr = hextoraw(lpad('&1', vsize(hladdr)*2 , '0'))
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order by
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tch desc
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/
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