вопрос по eaccelerator

Подключен eaccelerator. phpinfo выдает следующее:

eaccelerator.cache_dir	/tmp/eaccelerator	/tmp/eaccelerator

eaccelerator.check_mtime	1	1

eaccelerator.compress	1	1

eaccelerator.compress_level	3	3

eaccelerator.content	shm_and_disk	shm_and_disk

eaccelerator.debug	0	0

eaccelerator.enable	1	1

eaccelerator.filter	no value	no value

eaccelerator.keys	shm_and_disk	shm_and_disk

eaccelerator.log_file	no value	no value

eaccelerator.name_space	no value	no value

eaccelerator.optimizer	1	1

eaccelerator.sessions	shm_and_disk	shm_and_disk

eaccelerator.shm_max	0	0

eaccelerator.shm_only	0	0

eaccelerator.shm_prune_period	1800	1800

eaccelerator.shm_size	16	16

eaccelerator.shm_ttl	3600	3600

Почему кешируется только один скрипт?

Memory Size 16,777,180 Bytes

Memory Available 16,772,604 Bytes

Memory Allocated 4,576 Bytes

Cached Scripts 1