116 lines
5.1 KiB
SQL
116 lines
5.1 KiB
SQL
----------------------------------------------------------------------------------------
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--
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-- File name: cs_LGWR_report.sql
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--
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-- Purpose: Log Writer LGWR Slow Writes Duration Report - from current 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 PDB or CDB
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--
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-- Enter range of dates when requested.
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--
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-- Example: $ sqlplus / as sysdba
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-- SQL> @cs_LGWR_report.sql
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--
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-- Notes: Developed and tested on 19c
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--
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---------------------------------------------------------------------------------------
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--
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@@cs_internal/cs_primary.sql
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@@cs_internal/cs_cdb_warn.sql
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@@cs_internal/cs_set.sql
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@@cs_internal/cs_def.sql
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@@cs_internal/cs_file_prefix.sql
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--
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DEF cs_script_name = 'cs_LGWR_report';
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DEF cs_hours_range_default = '24';
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--
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@@cs_internal/cs_sample_time_from_and_to.sql
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@@cs_internal/cs_snap_id_from_and_to.sql
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--
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SELECT '&&cs_file_prefix._&&cs_script_name.' cs_file_name FROM DUAL;
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--
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-- @@cs_internal/&&cs_set_container_to_cdb_root.
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--
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@@cs_internal/cs_spool_head.sql
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PRO SQL> @&&cs_script_name..sql "&&cs_sample_time_from." "&&cs_sample_time_to."
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@@cs_internal/cs_spool_id.sql
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--
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@@cs_internal/cs_spool_id_sample_time.sql
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--
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PRO
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PRO Log Writer LGWR Slow Writes Duration
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PRO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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COL timestamp FOR A23 HEA 'Log Write|End|Timestamp' TRUNC;
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COL write_duration_ms FOR 999,990 HEA 'Write|Duration|(ms)';
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COL payload_size_kb FOR 999,999,990 HEA 'Payload|Size|KBs';
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COL kbps FOR 999,999,990 HEA 'KBs|per|Sec';
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--
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SELECT v4.timestamp,
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-- TO_CHAR(v4.timestamp, 'YYYY-MM-DD"T"HH24:MI:SS.FF3') AS timestamp,
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-- v4.payload_size AS payload_size_display,
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-- v4.write_duration AS write_duration_display,
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TO_NUMBER(REGEXP_REPLACE(v4.write_duration, '[^0-9]', '')) AS write_duration_ms,
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TO_NUMBER(REGEXP_REPLACE(v4.payload_size, '[^0-9]', '')) AS payload_size_kb,
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ROUND((TO_NUMBER(REGEXP_REPLACE(v4.payload_size, '[^0-9]', ''))) / NULLIF(TO_NUMBER(REGEXP_REPLACE(v4.write_duration, '[^0-9]', '')) / POWER(10,3), 0)) AS kbps
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FROM
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(
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SELECT v3.line_number,
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v3.timestamp,
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v3.write_duration,
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v3.payload_size,
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ROW_NUMBER() OVER (PARTITION BY v3.timestamp ORDER BY v3.payload_size DESC) AS rn
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FROM
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(
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SELECT v2.line_number,
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LAST_VALUE(v2.timestamp) IGNORE NULLS OVER (ORDER BY v2.line_number ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW) AS timestamp,
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v2.write_duration,
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v2.payload_size
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FROM
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(
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SELECT v1.line_number,
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CASE v1.line_type WHEN 'DATE' THEN CAST(TO_TIMESTAMP_TZ(v1.line_text, 'YYYY-MM-DD"T"HH24:MI:SS.FF6TZH:TZM') AS TIMESTAMP) END AS timestamp,
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CASE v1.line_type WHEN 'WRITE' THEN SUBSTR(v1.line_text, 1, INSTR(v1.line_text, ', size ') - 1) END AS write_duration,
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CASE v1.line_type WHEN 'WRITE' THEN SUBSTR(v1.line_text, INSTR(v1.line_text, ', size ') + 7) END AS payload_size
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FROM
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(
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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$diag_trace_file_contents
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WHERE trace_filename = (SELECT LOWER(b.name)||'_'||LOWER(p.pname)||'_'||p.spid||'.trc' AS lgwr_trc FROM v$diag_info d, v$process p, v$database b WHERE d.name = 'Diag Trace' AND p.pname = 'LGWR')
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) v1
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WHERE v1.line_type IN ('DATE', 'WRITE')
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AND v1.line_text IS NOT NULL
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) v2
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) v3
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WHERE v3.write_duration||payload_size IS NOT NULL
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AND timestamp IS NOT NULL
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) v4
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WHERE v4.rn = 1
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AND v4.timestamp >= TO_TIMESTAMP('&&cs_sample_time_from.', '&&cs_datetime_full_format.')
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AND v4.timestamp <= TO_TIMESTAMP('&&cs_sample_time_to.', '&&cs_datetime_full_format.')
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ORDER BY v4.timestamp
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/
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--
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PRO
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PRO SQL> @&&cs_script_name..sql "&&cs_sample_time_from." "&&cs_sample_time_to."
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--
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@@cs_internal/cs_spool_tail.sql
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--
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-- @@cs_internal/&&cs_set_container_to_curr_pdb.
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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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-- |