DbEnv::memp_trickle(int pct, int *nwrotep);
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.
If the nwrotep argument is non-NULL, the number of pages that
were written to reach the correct percentage is returned in the memory
location to which it refers.
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 either returns a non-zero error value or throws an exception that
encapsulates a non-zero error value on failure, and returns 0 on success.
The DbEnv::memp_trickle method may fail and throw an exception or return a non-zero error for the following conditions:
- An invalid flag value or parameter was specified.
The DbEnv::memp_trickle method may fail and throw an exception or return a non-zero error 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
either return DB_RUNRECOVERY or throw a
in which case all subsequent Berkeley DB calls will fail in the same way.
Memory Pools and Related Methods
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