allocate(additional) - JDO Sequence's method

void allocate(
  int additional

Provides a hint to the implementation that the application will need additional sequence value objects in short order. There is no externally visible behavior of this method. It is used to potentially improve the efficiency of the algorithm of obtaining additional sequence value objects.
additional - the number of additional values to allocate
JDO 2.0

This documentation page is derived (with some adjustments) from the JDO 2.2 API
and is available under the terms of the Apache License, v. 2.0.