Query Performance in OLAP MSAS Universe using Filter

Question

Hello,
We are at Business Objects XI 3.1/SP2. We have an OLAP universe that is built on MSAS 2008 OLAP Cube.
I see this huge performance difference in using a filter i have built for Today. Here are the MDX's- i ran the query in webi and isolated the mdx using SQL profiler
Case 1 - Hardcoded Date
CREATE SET [ Sales Cube].NSB6286E583B514117B33B203672E2A951_0 AS { [Team].[US Sales] }
CREATE SET [Sales Cube].NS7D81E652D4684D73B09A216CFE8934EE_1 AS Filter([Date].[Calendar Date].levels(4).allmembers,((([Date].[Calendar Date].currentmember.properties("CAPTION")="09 SEP 2010"))))
SELECT
  {[Measures].[Sales YTD ]} ON COLUMNS
,NON EMPTY
    CrossJoin
      CrossJoin
        CrossJoin
          NSB6286E583B514117B33B203672E2A951_0
         ,NS7D81E652D4684D73B09A216CFE8934EE_1
       ,AddCalculatedMembers
          [Team].[Employee].MEMBERS
     ,AddCalculatedMembers
        [Clients].MEMBERS
  DIMENSION PROPERTIES
    MEMBER_UNIQUE_NAME
   ,MEMBER_CAPTION
   ON ROWS
FROM [Sales Cube];
This comes back really fast..within seconds..
Now i have a today filter in the universe which is built as below..where Today is a ready-made function available in our cube.
<FILTER EXPRESSION="IIF(([Date].[Calendar Date].currentmember.properties(&quot;CAPTION&quot;))=([Today].item(0).MEMBER_CAPTION),1, 0)"><CONDITION
OPERATORCONDITION="Equal"><CONSTANT
CAPTION="1"/></CONDITION></FILTER>
When i use this to run my report.. It just keeps running for 30 mins and then just time's out. Can i design the filter better, so that instead of doing an IIF, it just uses a  single value.
Case 2 - Filter Date
CREATE SET [Sales Cube].NS34A72A83298145649AE7286D9F179AF_0 AS { [Team].[US Sales] }
WITH
  MEMBER [Measures].[2FF3DF31-5D02-4A9B-A8,BC,E7,25,C2,30,1B,61] AS
    IIF
        [Date].[Calendar Date].CurrentMember.Properties("CAPTION")
      =
        [Today].Item(0).Member_Caption
     ,1
     ,0
SELECT
  {[Measures].[Sales YTD]} ON COLUMNS
,NON EMPTY
    Filter
      CrossJoin
        CrossJoin
          CrossJoin
            AddCalculatedMembers
              [Date].[Calendar Date].[Date].MEMBERS
           ,NS34A72A83298145649AE7286D9F179AF_0
         ,AddCalculatedMembers
            [Team].[Employee].MEMBERS
       ,AddCalculatedMembers
          [Clients].MEMBERS
      [Measures].[2FF3DF31-5D02-4A9B-A8,BC,E7,25,C2,30,1B,61] = 1
  DIMENSION PROPERTIES
    MEMBER_UNIQUE_NAME
   ,MEMBER_CAPTION
   ON ROWS
FROM [Sales Cube];

Answer 1

Pablo,
This appears to be a generic database or OS issue, not a Text specific issue. It really depends on what your application is doing.
If your application is doing some other database activity such as queries or DMLs on other non-text tables, chances are Oracle Text related data blocks are being aged out of cache. You can either increase the db_cache_size init
parmater or try to keep the text tables and index tables blocks in cache using ALTER TABLE commands.
If your app is doing NON-database activity, then chances are your application is taking up much of the machine's physical memory such that OS is swapping ORACLE out of the memory. In which case, you may want to consider to add more memory to the machine or have ORACLE run on a separate machine by itself.