mongo中的索引更新问题

[sxy1993sxy2018]

mongo中为某一表创建索引，当该表中添加一条数据后，索引是否会自动更新？请各位提点下小弟

[sxy1993sxy2018]

//创建索引索引
| v_low | v_high | table |cost |
| 10000001 |10010000 |tb_10k |1188379 |
| 10000001 |10010000 |tb_100k |1141734 |
| 10000001 |10010000 |tb_500k |1158688 |
| 10000001 |10010000 |tb_1m |1119990 |
| 10000001 |10010000 |tb_5m |1155538 |

| v_low | v_high | table |cost |
| 10000001 |10010000 |tb_10k |1081048 |
| 10000001 |10010000 |tb_100k |1165677 |
| 10000001 |10010000 |tb_500k |1143103 |
| 10000001 |10010000 |tb_1m |1177736 |
| 10000001 |10010000 |tb_5m |1139347 |

//删除索引
| v_low | v_high | table |cost |
| 10000001 |10010000 |tb_10k |1262642 |
| 10000001 |10010000 |tb_100k |1226538 |
| 10000001 |10010000 |tb_500k |1174985 |
| 10000001 |10010000 |tb_1m |1356962 |
| 10000001 |10010000 |tb_5m |1374555 |

| v_low | v_high | table |cost |
| 10000001 |10010000 |tb_10k |1229126 |
| 10000001 |10010000 |tb_100k |1262389 |
| 10000001 |10010000 |tb_500k |1305174 |
| 10000001 |10010000 |tb_1m |1254248 |
| 10000001 |10010000 |tb_5m |1303942 |

测试了一下，发现有索引时插入时间会长一些，这部分时间是花在更新索引上了吧

[zy_think123]

插入数据之后会更新索引。