DB_ENV->memp_trickle()

#include <db.h>

int
DB_ENV->memp_trickle(DB_ENV *env, int percent, int *nwrotep);  

The DB_ENV->memp_trickle() method ensures that a specified percent of the pages in the cache are clean, by writing dirty pages to their backing files.

The purpose of the DB_ENV->memp_trickle() function is to enable a memory pool manager to ensure that a page is always available for reading in new information without having to wait for a write.

The DB_ENV->memp_trickle() method returns a non-zero error value on failure and 0 on success.

Parameters

nwrotep

The nwrotep parameter references memory into which the number of pages written to reach the specified percentage is copied.

percent

The percent parameter is the percent of the pages in the cache that should be clean.

Errors

The DB_ENV->memp_trickle() method may fail and return one of the following non-zero errors: following non-zero errors:

EINVAL

An invalid flag value or parameter was specified.

Class

DB_ENV, DB_MPOOLFILE

See Also

Memory Pools and Related Methods