报错内容：
Severity: Message: 10.254.19.14:27017: Encountered non-retryable error during query :: caused by :: Executor error during find command :: caused by :: Sort operation used more than the maximum 33554432 bytes of RAM. Add an index, or specify a smaller limit. Filename: Line Number:
截图：
增大索引值的内存：
db.adminCommand({setParameter:1, internalQueryExecMaxBlockingSortBytes:536870912})
#删除索引：
db.content.dropIndex("sort_-1")
#再次创建索引：
db.content.createIndex({sort: -1}, {background: true}) 参考：
https://blog.csdn.net/cloume/article/details/70767061
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