Oracle Database Error Solutions & DBA Guide

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Showing posts from August, 2019

Oracle Database Error Solutions & DBA Knowledge Base

Practical, step-by-step Oracle Database troubleshooting and administration resources for DBAs, developers, Oracle E-Business Suite administrators, and IT professionals.

Explore practical guidance covering Oracle Database errors, RMAN backup and recovery, Data Guard, ASM, RAC, performance tuning, installation, patching, cloning, Oracle Linux administration, and Oracle E-Business Suite.

Our troubleshooting guides explain common causes, diagnostic steps, SQL queries, configuration checks, and recommended solutions to help database professionals understand problems and resolve them systematically.

Start with the Oracle Error Codes Guide or explore the main DBA topic areas to find detailed technical articles and practical administration resources.

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ORA-01000: Maximum Open Cursors Exceeded – Causes, Diagnosis and Solutions

- August 26, 2019

ORA-01000: Maximum Open Cursors Exceeded in Oracle Database Practical troubleshooting guide to identify open-cursor usage, diagnose cursor leaks, check session activity, and resolve ORA-01000 safely. Last Updated: September 2026 ORA-01000: maximum open cursors exceeded occurs when an Oracle Database session attempts to have more open cursors than permitted by the OPEN_CURSORS initialization parameter. The error is commonly associated with application code that does not close cursors properly, connection-pool behavior, excessive concurrent cursor usage, or an OPEN_CURSORS value that is too low for the workload. Quick answer: Do not automatically increase OPEN_CURSORS and consider the problem solved. First determine which session is approaching the limit and whether the application is leaking cursors. Increase the parameter only when the workload genuinely requires more simultaneously open cursors. What Is ORA-01000? Ora...