Exceeded memory limit for $group, but didn't allow external sort
Exceeded memory limit for $group, but didn’t allow external sort因为Mongodb的聚合操作管道的输出结果不能超过16M，超过16M会出现错误。 Mongodb allowDiskUse: true 123456789db.stocks.aggregate( [ { $project : {
Exceeded memory limit for $group, but didn’t allow external sort因为Mongodb的聚合操作管道的输出结果不能超过16M，超过16M会出现错误。 Mongodb allowDiskUse: true 123456789db.stocks.aggregate( [ { $project : {