109 lines
4.2 KiB
SQL
109 lines
4.2 KiB
SQL
----------------------------------------------------------------------------------------
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--
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-- File name: cs_LGWR_trc.sql
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--
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-- Purpose: Get log writer LGWR trace
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--
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-- Author: Carlos Sierra
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--
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-- Version: 2023/01/03
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--
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-- Usage: Execute connected to CDB or PDB.
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--
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-- Example: $ sqlplus / as sysdba
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-- SQL> @cs_LGWR_trc.sql
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--
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-- Notes: Developed and tested on 12.1.0.2.
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--
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---------------------------------------------------------------------------------------
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--
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@@cs_internal/cs_set.sql
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@@cs_internal/cs_def.sql
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--
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COL trace_dir NEW_V trace_dir FOR A100 NOPRI;
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COL lgwr_trc NEW_V lgwr_trc FOR A30 NOPRI;
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SELECT d.value AS trace_dir, LOWER('&&cs_db_name._')||LOWER(p.pname)||'_'||p.spid||'.trc' AS lgwr_trc FROM v$diag_info d, v$process p WHERE d.name = 'Diag Trace' AND p.pname = 'LGWR';
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--
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HOS cat &&trace_dir./&&lgwr_trc.
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PRO
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PRO LONG WRITES
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PRO ~~~~~~~~~~~
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COL timestamp FOR A23;
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COL write_duration_display FOR A15;
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COL payload_size_display FOR A15;
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COL write_duration_ms FOR 999,999,999,990;
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COL payload_size_kb FOR 999,999,999,990;
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COL kbps FOR 999,990.000;
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WITH
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trace AS (
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SELECT d.value AS trace_dir, LOWER(b.name)||'_'||LOWER(p.pname)||'_'||p.spid||'.trc' AS lgwr_trc FROM v$diag_info d, v$process p, v$database b WHERE d.name = 'Diag Trace' AND p.pname = 'LGWR'
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),
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relevant_lines AS (
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SELECT line_number,
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CASE
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-- WHEN payload LIKE CHR(10)||'*** '||TO_CHAR(SYSDATE, 'YYYY')||'%' THEN 'DATE' -- failed after 2023-01-01
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WHEN payload LIKE CHR(10)||'*** ____-__-__T__:__:__%' THEN 'DATE'
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WHEN payload LIKE 'Warning: log write elapsed time %' THEN 'WRITE'
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END AS line_type,
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CASE
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-- WHEN payload LIKE CHR(10)||'*** '||TO_CHAR(SYSDATE, 'YYYY')||'%' THEN SUBSTR(SUBSTR(payload, 1, INSTR(payload, '(') - 2), INSTR(payload, TO_CHAR(SYSDATE, 'YYYY'))) -- failed after 2023-01-01
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WHEN payload LIKE CHR(10)||'*** ____-__-__T__:__:__%' THEN SUBSTR(SUBSTR(payload, 1, INSTR(payload, '(') - 2), INSTR(payload, '20'))
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WHEN payload LIKE 'Warning: log write elapsed time %' THEN REPLACE(payload, 'Warning: log write elapsed time ')
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END AS line_text
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FROM v$diag_trace_file_contents
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WHERE trace_filename = (SELECT lgwr_trc FROM trace)
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),
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parsed_lines AS (
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SELECT line_number,
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CASE line_type WHEN 'DATE' THEN CAST(TO_TIMESTAMP_TZ(line_text, 'YYYY-MM-DD"T"HH24:MI:SS.FF6TZH:TZM') AS TIMESTAMP) END AS timestamp,
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CASE line_type WHEN 'WRITE' THEN SUBSTR(line_text, 1, INSTR(line_text, ', size ') - 1) END AS write_duration,
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CASE line_type WHEN 'WRITE' THEN SUBSTR(line_text, INSTR(line_text, ', size ') + 7) END AS payload_size
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FROM relevant_lines
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WHERE line_type IN ('DATE', 'WRITE')
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AND line_text IS NOT NULL
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),
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normalized_lines AS (
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SELECT line_number,
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LAST_VALUE(timestamp) IGNORE NULLS OVER (ORDER BY line_number ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS timestamp,
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write_duration,
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payload_size
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FROM parsed_lines
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),
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filtered_lines AS (
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SELECT line_number,
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timestamp,
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write_duration,
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payload_size,
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ROW_NUMBER() OVER (PARTITION BY timestamp ORDER BY payload_size DESC) AS rn
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FROM normalized_lines
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WHERE write_duration||payload_size IS NOT NULL
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AND timestamp IS NOT NULL
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)
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SELECT timestamp,
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-- payload_size AS payload_size_display,
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-- write_duration AS write_duration_display,
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TO_NUMBER(REGEXP_REPLACE(payload_size, '[^0-9]', '')) AS payload_size_kb,
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TO_NUMBER(REGEXP_REPLACE(write_duration, '[^0-9]', '')) AS write_duration_ms,
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(TO_NUMBER(REGEXP_REPLACE(payload_size, '[^0-9]', ''))) / NULLIF(TO_NUMBER(REGEXP_REPLACE(write_duration, '[^0-9]', '')) / POWER(10,3), 0) AS kbps
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FROM filtered_lines
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WHERE rn = 1
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ORDER BY line_number
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/
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PRO
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PRO &&trace_dir./&&lgwr_trc.
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PRO
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HOS cp &&trace_dir./&&lgwr_trc. /tmp/
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HOS chmod 644 /tmp/&&lgwr_trc.
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PRO
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PRO Preserved LGWR trace on /tmp
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PRO ~~~~~~~~~~~~~~~~~~~~~~~
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HOS ls -oX /tmp/&&lgwr_trc.
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PRO
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PRO If you want to copy LGWR trace file, execute scp command below, from a TERM session running on your Mac/PC:
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PRO
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PRO scp &&cs_host_name.:/tmp/&&lgwr_trc. &&cs_local_dir.
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--
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@@cs_internal/cs_undef.sql
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@@cs_internal/cs_reset.sql
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--
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