High Availability Data Guard, Sharding and Global Data Services (MOSC)

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A query executed with high I/O Full tablescan after Dataguard S/O

in High Availability Data Guard, Sharding and Global Data Services (MOSC) 4 commentsAnswered

Hello,

i have a query that is running supposedly in 9 seconds only.. I did switchover my datagauard environment for some maintenance work. But 20 minutes after switchover, this query is triggered and spiked an I/O read on a 10million -record table with full tablescan and lasted for more than 10 minutes to complete.

is there something special on this statement on why would it suddenly have full tablescan after switchover and takes longer on the new primary.

 WITH temp_table AS

    (SELECT DISTINCT t.ftm_club_id

     FROM ceu_dnru_part  t,

        ceu_part_repo v,

        ceu_part_curr e,

        ceu_linecheck  lc

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