| Firebird Documentation Index → Firebird 2.1 Release Notes → New Configuration Parameters and Changes → MaxFileSystemCache |
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(V.2.1) Sets a threshold determining whether Firebird will allow the page cache to be duplicated to the filesystem cache or not. If this parameter is set to any (integer) value greater than zero, its effect depends on the current default size of the page cache: if the default page cache (in pages) is less than the value of MaxFileSystemCache (in pages) then filesystem caching is enabled, otherwise it is disabled.
This applies both when the page cache buffer size is set implicitly by the DefaultDBCachePages setting or explicitly as a database header attribute.
Thus,
To disable filesystem caching always, set MaxFileSystemCache to zero
To enable filesystem caching always, set MaxFileSystemCache an integer value that is sufficiently large to exceed the size of the database page cache. Remember that the effect of this value will be affected by subsequent changes to the page cache size.
The default setting for MaxFileSystemCache is 65536 pages, i.e. filesystem caching is enabled.
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| Firebird Documentation Index → Firebird 2.1 Release Notes → New Configuration Parameters and Changes → MaxFileSystemCache |