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Oracle Sharding : Part 2 – Installating & Configuring Shards

In Previous post of the series, I have written about an overview of Oracle Sharding and its features.

In this post, you will be seeing how to configure oracle shard and what steps are need to be performed.

Over all, I felt its very easy to setup and configurewhen compare to RAC setup. All you […]

Oracle Sharding: Part 1 – Overview

Oracle is releasing a whistle blowing feature in distributed databases (shared nothing architecture) which has been dominated by many other databases in recent years. In upcoming release Oracle 12.2 , the Oracle Sharding feature provides the exact capability of shared nothing architecture with Leader node and shard nodes to distribute the data to nodes […]

Rows in Sort order without order by clause?

I have been asked by one of colleague (Vasu) about a weird issue, that the query returns rows in sort order in one database not in the other database.

Without having much hassle, by running dbms_xplan.display_cursor(‘sql_id’,NULL,’ADVANCED) mode tell’s us the optimizer parameter “_gby_hash_aggregation_enabled” is having different values in each database. Which is mean to perform […]