/*
 * Set limits that trigger spilling to avoid exceeding hash_mem. Consider the
 * number of partitions we expect to create (if we do spill).
 *
 * There are two limits: a memory limit, and also an ngroups limit. The
 * ngroups limit becomes important when we expect transition values to grow
 * substantially larger than the initial value.
 */
void
hash_agg_set_limits(double hashentrysize, double input_groups, int used_bits,
					Size *mem_limit, uint64 *ngroups_limit,
					int *num_partitions);