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This script is intended to provide a user friendly guide to troubleshoot cell performance specifically to identify which cell(s) may be problematic. The script will create a file called cellperfdiag_<timestamp>.out in your local directory
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| -- This is not written by me and is a Oracle provided script | ||
| -- NAME: CELLPERFDIAG.SQL | ||
| -- ------------------------------------------------------------------------ | ||
| -- AUTHOR: Michael Polaski - Oracle Support Services | ||
| -- ------------------------------------------------------------------------ | ||
| -- PURPOSE: | ||
| -- This script is intended to provide a user friendly guide to troubleshoot | ||
| -- cell performance specifically to identify which cell(s) may be problematic. | ||
| -- The script will create a file called cellperfdiag_<timestamp>.out in your | ||
| -- local directory. | ||
|
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||
| set echo off | ||
| set feedback off | ||
| column timecol new_value timestamp | ||
| column spool_extension new_value suffix | ||
| select to_char(sysdate,'Mondd_hh24mi') timecol, | ||
| '.out' spool_extension from sys.dual; | ||
| column output new_value dbname | ||
| select value || '_' output | ||
| from v$parameter where name = 'db_name'; | ||
| spool cellperfdiag_&&dbname&×tamp&&suffix | ||
| set trim on | ||
| set trims on | ||
| set lines 160 | ||
| set long 10000 | ||
| set pages 60 | ||
| set verify off | ||
| alter session set optimizer_features_enable = '10.2.0.4'; | ||
|
|
||
| -- Additional formatting | ||
| column avg_wait_time format 99999999999.9 | ||
| column cell_name format a30 wra | ||
| column cell_path format a30 wra | ||
| column disk_name format a30 wra | ||
| column event format a40 wra | ||
| column inst_id format 999 | ||
| column minute format a12 tru | ||
| column sample_time format a25 tru | ||
| column total_wait_time format 99999999999.9 | ||
|
|
||
| PROMPT CELLPERFDIAG DATA FOR &&dbname&×tamp | ||
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| PROMPT | ||
| PROMPT IMPORTANT PARAMETERS RELATING TO CELL PERFORMANCE: | ||
| PROMPT | ||
| column name format a40 wra | ||
| column value format a40 wra | ||
| select inst_id, name, value from gv$parameter | ||
| where (name like 'cell%' or name like '_kcfis%' or name like '%fplib%') | ||
| and value is not null | ||
| order by 1, 2, 3; | ||
|
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||
| PROMPT | ||
| PROMPT TOP 20 CURRENT CELL WAITS | ||
| PROMPT | ||
| PROMPT This is to look at current cell waits, may not return any data. | ||
| select * from ( | ||
| select c.cell_path, sw.inst_id, sw.event, sw.p1 cellhash#, sw.p2 diskhash#, sw.p3 bytes, sw.state, sw.seconds_in_wait | ||
| from v$cell c, gv$session_wait sw | ||
| where sw.p1text = 'cellhash#' and c.cell_hashval = sw.p1 | ||
| order by 8 desc) | ||
| where rownum < 21; | ||
|
|
||
| PROMPT | ||
| PROMPT ASH CELL PERFORMANCE SUMMARY | ||
| PROMPT | ||
| PROMPT This query will look at the average cell wait times for each cell in ASH | ||
| select c.cell_path, sum(a.time_waited) TOTAL_WAIT_TIME, avg(a.time_waited) AVG_WAIT_TIME | ||
| from v$cell c, gv$active_session_history a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| group by c.cell_path | ||
| order by 3 desc, 2 desc; | ||
|
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||
| PROMPT | ||
| PROMPT 20 WORST CELL PERFORMANCE MINUTES IN ASH: | ||
| PROMPT | ||
| PROMPT APPROACH: These are the minutes where the avg cell perf time | ||
| PROMPT was the highest. See which cell had the longest waits and | ||
| PROMPT during what minute. | ||
| select * from ( | ||
| select to_char(a.sample_time,'Mondd_hh24mi') minute, c.cell_path, | ||
| sum(a.time_waited) TOTAL_WAIT_TIME, avg(a.time_waited) AVG_WAIT_TIME | ||
| from v$cell c, gv$active_session_history a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| group by to_char(sample_time,'Mondd_hh24mi'), c.cell_path | ||
| order by 4 desc, 3 desc) | ||
| where rownum < 21; | ||
|
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||
| PROMPT | ||
| PROMPT 50 LONGEST CELL WAITS IN ASH ORDERED BY WAIT TIME | ||
| PROMPT | ||
| PROMPT APPROACH: These are the top 50 individual cell waits in ASH | ||
| PROMPT in wait time order. | ||
| select * from ( | ||
| select a.sample_time, c.cell_path, a.inst_id, a.event, a.p1 cellhash#, a.p2 diskhash#, a.p3 bytes, a.time_waited | ||
| from v$cell c, gv$active_session_history a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| order by time_waited desc) | ||
| where rownum < 51; | ||
|
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||
| PROMPT | ||
| PROMPT 100 LONGEST CELL WAITS IN ASH ORDERED BY SAMPLE TIME | ||
| PROMPT | ||
| PROMPT APPROACH: These are the top 50 individual cell waits in ASH | ||
| PROMPT in sample time order. | ||
| select * from ( | ||
| select * from ( | ||
| select a.sample_time, c.cell_path, a.inst_id, a.event, a.p1 cellhash#, a.p2 diskhash#, a.p3 bytes, a.time_waited | ||
| from v$cell c, gv$active_session_history a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| order by time_waited desc) | ||
| where rownum < 101) | ||
| order by 1; | ||
|
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||
| PROMPT | ||
| PROMPT ASH HISTORY CELL PERFORMANCE SUMMARY | ||
| PROMPT | ||
| PROMPT This query will look at the average cell wait times for each cell in ASH | ||
| select c.cell_path, sum(a.time_waited) TOTAL_WAIT_TIME, avg(a.time_waited) AVG_WAIT_TIME | ||
| from v$cell c, DBA_HIST_ACTIVE_SESS_HISTORY a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| group by c.cell_path | ||
| order by 3 desc, 2 desc; | ||
|
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||
| PROMPT | ||
| PROMPT 20 WORST CELL PERFORMANCE MINUTES IN ASH HISTORY: | ||
| PROMPT | ||
| PROMPT APPROACH: These are the minutes where the avg cell perf time | ||
| PROMPT was the highest. See which cell had the longest waits and | ||
| PROMPT during what time minute. | ||
| select * from ( | ||
| select to_char(a.sample_time,'Mondd_hh24mi') minute, c.cell_path, | ||
| sum(a.time_waited) TOTAL_WAIT_TIME, avg(a.time_waited) AVG_WAIT_TIME | ||
| from v$cell c, DBA_HIST_ACTIVE_SESS_HISTORY a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| group by to_char(sample_time,'Mondd_hh24mi'), c.cell_path | ||
| order by 4 desc, 3 desc) | ||
| where rownum < 21; | ||
|
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||
| PROMPT | ||
| PROMPT 50 LONGEST CELL WAITS IN ASH HISTORY ORDERED BY WAIT TIME | ||
| PROMPT | ||
| PROMPT APPROACH: These are the top 50 individual cell waits in ASH | ||
| PROMPT history in wait time order. | ||
| select * from ( | ||
| select a.sample_time, c.cell_path, a.instance_number inst_id, a.event, a.p1 cellhash#, a.p2 diskhash#, a.p3 bytes, a.time_waited | ||
| from v$cell c, DBA_HIST_ACTIVE_SESS_HISTORY a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| order by time_waited desc) | ||
| where rownum < 51; | ||
|
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||
| PROMPT | ||
| PROMPT 100 LONGEST CELL WAITS IN ASH HISTORY ORDERED BY SAMPLE TIME | ||
| PROMPT | ||
| PROMPT APPROACH: These are the top 100 individual cell waits in ASH | ||
| PROMPT history in sample time order. | ||
| select * from ( | ||
| select * from ( | ||
| select a.sample_time, c.cell_path, a.instance_number inst_id, a.event, a.p1 cellhash#, a.p2 diskhash#, a.p3 bytes, a.time_waited | ||
| from v$cell c, DBA_HIST_ACTIVE_SESS_HISTORY a | ||
| where a.p1text = 'cellhash#' and c.cell_hashval = a.p1 | ||
| order by time_waited desc) | ||
| where rownum < 101) | ||
| order by 1; | ||
|
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||
| PROMPT | ||
| PROMPT AWR CELL DISK UTILIZATION | ||
| PROMPT | ||
| PROMPT APPROACH: This query only works in 12.1 and above. This is looking | ||
| PROMPT in the AWR history tables to look at cell disk utilization for some | ||
| PROMPT of the worst periods. Top 100 disk utils. | ||
| PROMPT DISK_UTILIZATION_SUM: Sum of the per-minute disk utilization metrics. | ||
| PROMPT IO_REQUESTS_SUM: Sum of the per-minute IOPs. | ||
| PROMPT IO_MB_SUM: Sum of the per-minute I/O metrics, in megabytes per second. | ||
| select * from (select * from ( | ||
| select distinct dhs.snap_id, to_char(dhs.begin_interval_time,'Mondd_hh24mi') BEGIN, | ||
| to_char(dhs.end_interval_time,'Mondd_hh24mi') END, | ||
| cd.cell_name, cd.disk_name, DISK_UTILIZATION_SUM, IO_REQUESTS_SUM, IO_MB_SUM | ||
| from dba_hist_snapshot dhs, DBA_HIST_CELL_DISK_SUMMARY cds, v$cell_disk cd | ||
| where (cds.cell_hash = cd.cell_hash and cds.disk_id = cd.disk_id) | ||
| and dhs.snap_id = cds.snap_id and to_char(dhs.begin_interval_time,'Mondd_hh24') in | ||
| (select hour from ( | ||
| select to_char(a.sample_time,'Mondd_hh24') hour, avg(a.time_waited) AVG_WAIT_TIME | ||
| from DBA_HIST_ACTIVE_SESS_HISTORY a | ||
| where event like 'cell%' or event like 'db file%' or event like 'log file%' or event like 'control file%' | ||
| group by to_char(a.sample_time,'Mondd_hh24') | ||
| order by 2 desc) | ||
| where rownum < 6) | ||
| order by DISK_UTILIZATION_SUM desc, IO_REQUESTS_SUM desc) | ||
| where rownum < 101) | ||
| order by 1,2,3,4,5; | ||
|
|
||
| SELECT ksqdngunid DB_ID_FOR_CURRENT_DB FROM X$KSQDN; | ||
|
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| PROMPT | ||
| PROMPT CELL THREAD HISTORY - LAST FEW MINUTES | ||
| PROMPT | ||
| PROMPT This query only works in 12.1 and above. | ||
| select * from ( | ||
| select count(*), sql_id, cell_name, job_type, database_id, instance_id | ||
| from v$cell_thread_history | ||
| where wait_state not in ('waiting_for_SKGXP_receive','waiting_for_connect','looking_for_job') | ||
| group by sql_id, cell_name, job_type, database_id, instance_id | ||
| order by 1 desc, 2, 3) | ||
| where rownum < 51; | ||
|
|
||
| PROMPT | ||
| PROMPT CELL CONFIG | ||
| PROMPT | ||
| select cellname, XMLTYPE.createXML(confval) confval | ||
| from v$cell_config | ||
| where conftype='CELL'; | ||
|
|
||
| PROMPT | ||
| PROMPT IORM CONFIG | ||
| PROMPT | ||
| select cellname, XMLTYPE.createXML(confval) confval | ||
| from v$cell_config | ||
| where conftype='IORM'; | ||
|
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||
| select to_char(sysdate,'Mondd hh24:mi:ss') TIME from dual; | ||
|
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| spool off | ||
|
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| PROMPT | ||
| PROMPT OUTPUT FILE IS: cellperfdiag_&&dbname&×tamp&&suffix | ||
| PROMPT | ||
|
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