For a legacy environment that requires maximum uptime and minimal intervention, Oracle 10.2.0.5 remains a stellar example of mature software engineering. It wasn't flashy, but it worked—exactly what you want from a database engine.
Better recognition of patterns involving optional bind variables, optimizing when to trigger full table scans versus selective index lookups. 3. Asynchronous I/O Implementation oracle 10.2.0.5
Oracle 10.2.0.5 represents a high-water mark for traditional database administration. It was the last version before Oracle began aggressively pushing toward Exadata integration and the "pluggable" database architecture of 12c. For a legacy environment that requires maximum uptime