DB->set_q_extentsize()
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## DB->set_q_extentsize()

    #include <db.h>

    int
    DB->set_q_extentsize(DB *db, u_int32_t extentsize);

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.

For information on tuning the extent size, see Selecting a extent size.

The `DB->set_q_extentsize()` method configures a database, not only operations performed using the specified DB handle.

The `DB->set_q_extentsize()` method may not be called after the DB->open() method is called. If the database already exists when DB->open() is called, the information specified to `DB->set_q_extentsize()` will be ignored.

The `DB->set_q_extentsize()` method returns a non-zero error value on failure and 0 on success.

### Parameters

#### extentsize

The extentsize parameter is the number of pages in a Queue database extent.

### Errors

The `DB->set_q_extentsize()` method may fail and return one of the following non-zero errors:

#### EINVAL

If the method was called after DB->open() was called; or if an invalid flag value or parameter was specified.

### Class

DB

### See Also

Database and Related Methods

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