Berkeley DB: DbEnv.memp_trickle
Description: Berkeley DB: An embedded database programmatic toolkit.
Keywords: embedded,database,programmatic,toolkit,b+tree,btree,hash,hashing,transaction,transactions,locking,logging,access method,access methods,java,C,C++

# DbEnv.memp_trickle |

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    import com.sleepycat.db.*;

    public int memp_trickle(int pct)
        throws DbException;

# Description

The DbEnv.memp_trickle method ensures that at least pct percent of the pages in the shared memory pool are clean by writing dirty pages to their backing files. The number of pages that were written to reach the correct percentage is returned.

The purpose of the DbEnv.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 DbEnv.memp_trickle method throws an exception that encapsulates a non-zero error value on failure.

# Errors

The DbEnv.memp_trickle method may fail and throw an exception encapsulating a non-zero error for the following conditions:

EINVAL
  An invalid flag value or parameter was specified.

The DbEnv.memp_trickle method may fail and throw an exception for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbEnv.memp_trickle method may fail and throw a DbRunRecoveryException, in which case all subsequent Berkeley DB calls will fail in the same way.

# Class

DbEnv, DbMpoolFile

# See Also

Memory Pools and Related Methods`

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