.
\nHere is a little script I use from time to time to look at V$MYSTAT values and displaying on one line a set of statistics with their delta value between two calls.
\n
\nThe first script, _mystat_init.sql, initializes the variables. The second one displays the values, such as:<\/p>\n
\nSQL> @ _mystat_diff.sql\n \ndb block changes redo size undo change vector size redo entries\n---------------- ---------------- ----------------------- ----------------\n 57,371 15,445,852 6,111,608 37,709\n<\/code><\/pre>\nThose two scripts are generated by defining the statistics:<\/p>\n
\ndefine names=\"'redo size','redo entries','undo change vector size','db block changes'\"\n<\/code><\/pre>\nabd running the following to spool the two scripts:<\/p>\n
\nsqlplus -s \/ as sysdba <<'END'\nset pagesize 0 feedback off linesize 1000 trimspool on verify off echo off\nwith stats as (\n select rownum n,stat_id,name from (select stat_id,name from v$statname where name in (&names) order by stat_id)\n)\nselect 'define LAG'||stat_id||'=0' from stats\nunion all\nselect 'column "CUR'||stat_id||'" new_value '||'LAG'||stat_id||' noprint' from stats\nunion all\nselect 'column "DIF'||stat_id||'" heading '''||name||''' format 999G999G999G999' from stats\n.\nspool _mystat_init.sql\n\/\nspool off\nwith stats as (\n select rownum n,stat_id,name from (select stat_id,name from v$statname where name in (&names) order by stat_id)\n)\nselect 'set termout off verify off' from dual\nunion all\nselect 'select ' from dual\nunion all\nselect ' '||decode(n,1,' ',',')||'"CUR'||stat_id||'" - '||'&'||'LAG'||stat_id||' "DIF'||stat_id||'"' from stats\nunion all\nselect ' '||',nvl("CUR'||stat_id||'",0) "CUR'||stat_id||'"' from stats\nunion all\n--select ','''||'&'||'1'' comments' from dual\n--union all\nselect q'[from (select stat_id,value from v$mystat join v$statname using(statistic#) where name in (&names)) pivot (avg(value)for stat_id in (]' from dual\nunion all\nselect ' '||decode(n,1,' ',',')||stat_id||' as "CUR'||stat_id||'"' from stats\nunion all\nselect '))' from dual\nunion all\nselect '.' from dual\nunion all\nselect 'set termout on' from dual\nunion all\nselect '\/' from dual\n.\nspool _mystat_diff.sql\n\/\nspool off\nEND\n<\/code><\/pre>\nThen, in sqlplus or SQLcl, you run:<\/p>\n
\nSQL> _mystat_init.sql\n<\/code><\/pre>\nto initialize the values to 0 and:<\/p>\n
\nSQL> @ _mystat_diff.sql\n<\/code><\/pre>\neach time you want to display the difference from last call.<\/p>\n","protected":false},"excerpt":{"rendered":"
By Franck Pachot . Here is a little script I use from time to time to look at V$MYSTAT values and displaying on one line a set of statistics with their delta value between two calls.<\/p>\n","protected":false},"author":27,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[59],"tags":[96,255],"type_dbi":[],"class_list":["post-10822","post","type-post","status-publish","format-standard","hentry","category-oracle","tag-oracle","tag-statistics"],"acf":[],"yoast_head":"\n
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