Sql Server 2008 Performance issue combinning CONTAINSTABLE and OR -


table_x contains 7000 rows table_y contains 1 000 000 rows

this request running fast on sql server2005 take 3 minutes on sql server 2008

select [extent1].[id] [id]    [dbo].[tablex] [extent1] inner join [dbo].[tabley] [extent2] on [extent1].[id] = [extent2].[fk_id] (     (         [extent2].[fk_id] in (             (                 select [key]                 containstable([tablex], (description), n'"pmi_log"') [ct]                 )             )         )     or (         [extent2].[id] in (             (                 select [key]                 containstable([tabley], (description), n'"pmi_log"') [ct]                 )             )         )     )

already rebuild index, statistics , catalog.

the 2 subqueries (select..from containstable...) take 15ms

the execution plan takes 100% of time in table valued function [fulltextmatch]

after lots of test, happens when put or between fulltext queries, performance falling down.

can ?

thx,

this questions same problem: sql server 2008 full-text search (fts) extremely slow when more 1 containstable in query

this a known issue sql 2008 / 2008 r2. fixed in 2008 sp1 cu9 , 2008 r2 cu4.

as workaround, can split query 2 , union results.

select     [extent1].[id] [id]        [dbo].[tablex] [extent1]    inner join [dbo].[tabley] [extent2]     on [extent1].[id] = [extent2].[fk_id]    [extent2].[fk_id] in     (       select [key]       containstable([tablex], (description), n'"pmi_log"') [ct]    )  union  select     [extent1].[id] [id]        [dbo].[tablex] [extent1]    inner join [dbo].[tabley] [extent2]     on [extent1].[id] = [extent2].[fk_id]    [extent2].[fk_id] in     (       select [key]       containstable([tabley], (description), n'"pmi_log"') [ct]    )

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