Berkeley DB: DB_ENV->memp_trickle
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,Java,C,C++

### DB_ENV->memp_trickle |

`

###

    #include <db.h>

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

### Description: DB_ENV->memp_trickle

The DB_ENV->memp_trickle method ensures that a specified percent of the pages in the shared memory pool 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:

EINVAL
  An invalid flag value or parameter was specified.

### Class

DB_ENV, DB_MPOOLFILE

### See Also

Memory Pools and Related Methods`

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