||Oracle Tips by Burleson
Chapter 7 Oracle Storage and Object
Clusters can be indexed or hashed in Oracle8,
Oracle8i, or Oracle9i. Using the various views and tables available
to the DBA, such as dba_clusters, dba_clu_columns,
dba_cluster_hash_functions, and dba_table, clusters can be readily
A single table cluster has the ability
to store key values in physically contiguous blocks. This makes
access by cluster key very fast, and became available with Oracle8i.
Clusters didn’t change in Oracle9i. The relationships between the
views that monitor clusters are shown in Figure 7.3 below. A script
for generating a cluster report is shown, and the sample report is
shown under that.
Figure 7.3 dba_clusters view cluster
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