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rwijk.blogspot.com | ||
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savvinov.com
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| | | | | In this post, I continue on the topic of examining SQL plans. I will talk about one DBMS_XPLAN function, DISPLAY_CURSOR (because it's probably the most useful one when troubleshooting ongoing performance issues, and also because other functions have a lot of similiarity to it). I will discuss frequently used options and some common problems. Preparation... | |
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hourim.wordpress.com
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| | | | | The last Jonathan Lewis post on RAC Planswhich finished by the following phrases: "If you're going to hard-code hints into a query then take a look at the outline it generates when it does the right thing, and that will tell you about the 15 or so hints you've missed out. (Better still, consider generating... | |
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jonathanlewis.wordpress.com
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| | | | | In response to a recent lamentation from Richard Foote about the degree of ignorance regarding the clustering_factor of indexes I commented on the similar degree of ignorance regarding the syntax of a specific hint, namely use_nl(a b), pointing out that this does not mean "do a nested loop from a to b". My comment was... | |
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mauro-pagano.com
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| | | Every once in a while I look around the list of new (fixed) views in the instance trying to find useful / interesting things to add to SQLd360 and recently I stumbled into V$SQL_DIAG_REPOSITORY / V$SQL_DIAG_REPOSTIORY_REASON. SQL> desc v$sql_diag_repository Name Null? Type ------------------ -------- ------------- ADDRESS RAW(8) CON_ID NUMBER HASH_VALUE NUMBER SQL_ID VARCHAR2(13) CHILD_NUMBER NUMBER... | ||
