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Changes to the Firebird API and ODS

Table of Contents

ODS (On-Disk Structure) Changes
API (Application Programming Interface) Extensions

ODS (On-Disk Structure) Changes

New ODS Number
Maximum Page Size
Maximum Number of Page Buffers in Cache

On-disk structure (ODS) changes include the following:

New ODS Number

Firebird 2.5 creates databases with an ODS (On-Disk Structure) version of 11.2

Maximum Page Size

The maximum page size remains 16 KB (16384 bytes).

Maximum Number of Page Buffers in Cache

The maximum number of pages that can be configured for the database cache depends on whether the database is running under 64-bit or 32-bit Firebird:

  • 64-bit :: 2^31 -1 (2,147,483,647) pages

  • 32-bit :: 128,000 pages, i.e., unchanged from V.2.1

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Firebird Documentation Index → Firebird 2.5 Release Notes → Changes to the Firebird API and ODS