( ! ) Fatal error: Allowed memory size of 536870912 bytes exhausted (tried to allocate 32 bytes) in C:\wamp\www\jiurihui\ThinkPHP\Library\Think\Db\Driver.class.php on line 288
Call Stack
#	Time	Memory	Function	Location
1	0.0000	239864	{main}( )	..\index.php:0
2	0.0049	519576	require( 'C:\wamp\www\jiurihui\ThinkPHP\ThinkPHP.php' )	..\index.php:30
3	0.0059	657648	Think\Think::start( )	..\ThinkPHP.php:97
4	0.0117	1954952	Think\App::run( )	..\Think.class.php:120
5	0.0137	1971024	Think\Hook::listen( )	..\common~runtime.php:1
6	0.0146	2015328	Think\Hook::exec( )	..\common~runtime.php:1
7	0.0146	2038656	Behavior\CronRunBehavior->run( )	..\common~runtime.php:1
8	0.0156	2125608	include( 'C:\wamp\www\jiurihui\Application\Common\Cron\cron.php' )	..\CronRunBehavior.class.php:44
9	0.1279	3294056	Think\Model->select( )	..\cron.php:237
10	0.1279	3295032	Think\Db\Driver->select( )	..\Model.class.php:579
11	0.1279	3295256	Think\Db\Driver->query( )	..\Driver.class.php:935
12	0.8144	139653624	Think\Db\Driver->getResult( )	..\Driver.class.php:176
13	0.8144	139653720	fetchAll ( )	..\Driver.class.php:288