||Oracle Tips by Burleson
Chapter 1 Oracle 10g Grid Computing
Oracle 8i OPS implementation brought in many
significant changes. The significant new feature was the
introduction of Cache Fusion technology; Cache Fusion is a concept
where Cache (or SGA) from the multiple instances coordinate the
buffers (or cache) and manage the database access.
Oracle 8i (OPS) introduced the initial phase of
cache fusion. The data blocks were transferred from the SGA of one
instance to the SGA of another instance without the need to write
the blocks to disk. This was aimed at reducing the ‘ping’ overhead
of data blocks. However, the partial implementation of cache fusion
in Oracle 8i could help only in certain conditions.
With OPS, scalability was always an issue. OPS
implementations used to suffer from tedious application design and
coding, database management issues. There were many performance
issues reported. OPS lacked good tools to manage, which used to
frustrate DBA(s) and application users.
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