.SH DESCRIPTION
The \fBbdb\fP backend to
.BR slapd (8)
-is the recommended backend for a normal
+is the recommended primary backend for a normal
.B slapd
database.
-However, it takes more care than with the LDBM backend to configure
-it properly.
It uses the Sleepycat Berkeley DB (BDB) package to store data.
It makes extensive use of indexing and caching to speed data access.
.LP
by the \fBbdb\fP or \fBhdb\fP backend database instance.
The default is 1000 entries.
.TP
+.BI cachefree \ <integer>
+Specify the number of entries to free from the entry cache when the
+cache reaches the \fBcachesize\fP limit.
+The default is 1 entry.
+.TP
.BI checkpoint \ <kbyte>\ <min>
Specify the frequency for checkpointing the database transaction log.
A checkpoint operation flushes the database buffers to disk and writes