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< th colspan = "3" align = "center" > DB-> set_q_extentsize()< / th >
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The DB Handle
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< h2 class = "title" style = "clear: both" > < a id = "dbset_q_extentsize" > < / a > DB-> set_q_extentsize()< / h2 >
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< pre class = "programlisting" > #include < db.h>
int
DB-> set_q_extentsize(DB *db, u_int32_t extentsize); < / pre >
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Set the size of the extents used to hold pages in a Queue database,
specified as a number of pages. Each extent is created as a separate
physical file. If no extent size is set, the default behavior is to
create only a single underlying database file.
< / p >
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For information on tuning the extent size, see < a href = "../../programmer_reference/rq_conf.html#am_conf_extentsize" class = "olink" > Selecting a extent size< / a > .
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The < code class = "methodname" > DB-> set_q_extentsize()< / code > method configures a database, not only
operations performed using the specified < a class = "link" href = "db.html" title = "Chapter > DB< / a >
handle.
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The < code class = "methodname" > DB-> set_q_extentsize()< / code > method may not be called after the
< a class = "xref" href = "dbopen.html" title = "DB->open()" > DB-> open()< / a > method is called. If
the database already exists when
< a class = "xref" href = "dbopen.html" title = "DB->open()" > DB-> open()< / a > is called, the
information specified to < code class = "methodname" > DB-> set_q_extentsize()< / code > will be ignored.
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The < code class = "methodname" > DB-> set_q_extentsize()< / code > < span >
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method returns a non-zero error value on failure and 0 on success.
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< h3 class = "title" > < a id = "id3691896" > < / a > Parameters< / h3 >
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< h4 class = "title" > < a id = "id3692013" > < / a > extentsize< / h4 >
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The < span class = "bold" > < strong > extentsize< / strong > < / span > parameter is the
number of pages in a Queue database extent.
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< h3 class = "title" > < a id = "id3691921" > < / a > Errors< / h3 >
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The < code class = "methodname" > DB-> set_q_extentsize()< / code > < span >
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method may fail and return one of the following non-zero errors:
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< h4 class = "title" > < a id = "id3691870" > < / a > EINVAL< / h4 >
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If the method was called after < a class = "xref" href = "dbopen.html" title = "DB->open()" > DB-> open()< / a >
was called; or if an invalid flag value or parameter was specified.
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< a class = "link" href = "db.html" title = "Chapter > DB< / a >
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< a class = "xref" href = "db.html#dblist" title = "Database and Related Methods" > Database and Related Methods< / a >
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