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< th colspan = "3" align = "center" > DB_ENV-> set_mp_pagesize()< / th >
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The DB_MPOOLFILE Handle
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< h2 class = "title" style = "clear: both" > < a id = "envset_mp_pagesize" > < / a > DB_ENV-> set_mp_pagesize()< / h2 >
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< pre class = "programlisting" > #include < db.h>
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DB_ENV-> set_mp_pagesize(DB_ENV *dbenv, u_int32_t pagesize); < / pre >
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The < code class = "methodname" > DB_ENV-> set_mp_pagesize()< / code > method sets the pagesize used to allocate the hash table and the number of mutexes expected to be needed by the buffer pool.
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You must call this method only before the environment is opened.
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< h4 class = "title" > < a id = "id3736627" > < / a > pagesize< / h4 >
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The pagesize parameter specifies expected page size use. Generally, it is set to the expected average page size for all the data pages that are in the buffer pool.
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< a class = "xref" href = "memp.html#memplist" title = "Memory Pools and Related Methods" > Memory Pools and Related Methods< / a > ,
< a class = "xref" href = "envget_mp_pagesize.html" title = "DB_ENV->get_mp_pagesize()" > DB_ENV-> get_mp_pagesize()< / a >
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