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The
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profiling
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service
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generates
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information
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related
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to
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O3
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Server
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as
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well
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as
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to
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each
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cube
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published
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in
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it.
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This
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information
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is
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saved
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in
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different
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log
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files,
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whose
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structures
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and
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characteristics
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are
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presented
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below.
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The
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generation
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of
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log
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information
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by
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the
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profiling
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service
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can
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be
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performed
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in
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two
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different
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ways:
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sampling
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certain
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indicators
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at
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regular
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time
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frames,
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or
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in
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the
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face
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of
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any
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given
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event,
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such
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as
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a
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query
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being
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made,
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a
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user logging
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in
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or logging
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out,
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or
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a
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failed
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connection
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to
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the
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server.
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In
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the
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first
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case,
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as
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the
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time
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frame
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defined
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in
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the
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setup
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goes
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by,
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a
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record
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is
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generated
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in
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some
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of
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the
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log
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files
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(O3CubeService,
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Sessions
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y
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Cubes),
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with
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the
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current
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values
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of
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the
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defined
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indicators
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(
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for
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instance:
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cache
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memory
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used
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at
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that
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time,
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number
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of
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open
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sessions
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at
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the
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time,
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etc.).
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For
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this
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information
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to
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be
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used
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in
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the
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building
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of
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a
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cube,
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and
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to
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eventually
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enable
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the
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comparison
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among
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different
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days,
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weeks,
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months,
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etc.,
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the
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samples
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must
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always
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be
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taken
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at
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the
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same
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time
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frame
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in
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the
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day
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(
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that
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is
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to
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say
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that
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the
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beginning
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and
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ending
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of
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the
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sampling
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must
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occur
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at
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the
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same
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time)
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and with the same frequency.
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If
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any
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of
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these
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parameters
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are
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modified,
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it
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is
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advisable
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to delete previous data from the log files.
In the second case, each time any user makes, let us say, a query on O3 Server, a record is generated in some of the files (Audit and Queries) with information related to the performed query (query time in milliseconds, percentage of correct answers in the cache for that query, etc.) or with the values of some indicators at that time. Something similar happens in the case of a log in event.
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