mongodb docker 性能特别差怎么才能提升呢？

[SlipStupig]

用 docker-compose 构建了一个服务，mongodb 里面载入了几百万数据，数据查询慢的无法忍受, 但是实体机上几乎是瞬间完成, docker 就非常非常慢, 我的 docker 版本是:17.03.1-ce,

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• log 如下:

mongodb_1    | 2017-06-14T08:33:53.167+0000 I QUERY    [conn84] query Info.info_b query: { geoname_id: 7533614 } planSummary: COLLSCAN cursorid:10038145745 ntoreturn:0 ntoskip:0 keysExamined:0 docsExamined:1818459 keyUpdates:0 writeConflicts:0 numYields:14206 nreturned:101 reslen:5141 locks:{ Global: { acquireCount: { r: 28414 } }, Database: { acquireCount: { r: 14207 } }, Collection: { acquireCount: { r: 14207 } } } 613ms
mongodb_1    | 2017-06-14T08:33:53.559+0000 I QUERY    [conn84] getmore Info.info_b query: { geoname_id: 7533614 } cursorid:10038145745 ntoreturn:0 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:8854 nreturned:219 reslen:11230 locks:{ Global: { acquireCount: { r: 17710 } }, Database: { acquireCount: { r: 8855 } }, Collection: { acquireCount: { r: 8855 } } } 389ms
mongodb_1    | 2017-06-14T08:33:53.569+0000 I NETWORK  [conn84] end connection 172.18.0.4:60124 (0 connections now open)
mongodb_1    | 2017-06-14T08:33:53.570+0000 I NETWORK  [initandlisten] connection accepted from 172.18.0.4:60128 #85 (1 connection now open)
mongodb_1    | 2017-06-14T08:33:54.555+0000 I QUERY    [conn85] query Info.info_b query: { geoname_id: 8223931 } planSummary: COLLSCAN ntoreturn:0 ntoskip:0 keysExamined:0 docsExamined:2951856 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:23061 nreturned:2 reslen:119 locks:{ Global: { acquireCount: { r: 46124 } }, Database: { acquireCount: { r: 23062 } }, Collection: { acquireCount: { r: 23062 } } } 984ms
mongodb_1    | 2017-06-14T08:33:54.557+0000 I NETWORK  [conn85] end connection 172.18.0.4:60128 (0 connections now open)
mongodb_1    | 2017-06-14T08:33:54.557+0000 I NETWORK  [initandlisten] connection accepted from 172.18.0.4:60130 #86 (1 connection now open)
mongodb_1    | 2017-06-14T08:33:55.534+0000 I QUERY    [conn86] query Info.info_b query: { geoname_id: 8223932 } planSummary: COLLSCAN ntoreturn:0 ntoskip:0 keysExamined:0 docsExamined:2951856 cursorExhausted:1 keyUpdates:0 writeConflicts:0 numYields:23061 nreturned:34 reslen:1746 locks:{ Global: { acquireCount: { r: 46124 } }, Database: { acquireCount: { r: 23062 } }, Collection: { acquireCount: { r: 23062 } } } 976ms

---

docker-compose:

version: '2'
services:
    shmserver:
        build:
            context: ../
            dockerfile: Dockerfile

        ports:
            - "18081:18081"

        links:
            - redis:redis
            - mongodb:mongodb

        depends_on:
            - redis
            - mongodb

    redis:
        image: redis:latest
        volumes:
            - /home/database:/var/lib/redis

        ports:
          - "6479:6379"

    mongodb:
      image: mongo
      volumes:
        - /home/db:/home/db

      ports:
        - "27017:27017"

      command: --storageEngine wiredTiger --dbpath /home/db

怎么才能提升性能呢？

[leandre]

docker 使用的是网络目录挂载，也就是配置文件中`/home/db`实际上是走虚拟网络读取数据，性能会降低。

[SlipStupig]

@leandre 有什么解决办法吗？

[Chingim]

宿主是什么系统？

[Chingim]

如果是 OSX, 可能要看看这个 issue:
https://github.com/docker/for-mac/issues/77#issuecomment-280396677

[SlipStupig]

@Chingim ubuntu

[billlee]

@leandre #1 volumes 默认是 aufs 吧，和网络有什么关系

[hljjhb]

数据库不要放在 docker 里= =

[swcat]

数据库不要放 docker 里面

[SlipStupig]

@hljjhb
@swcat 只能在物理机里面操作？没有什么办法提高性能么？

[oyyd]

试一下使用宿主机的网络`docker run --net=host`

[oyyd]

@SlipStupig 我这边未来也会有类似的事情，我很在意你们在 docker 里面运行 mongodb 到底有没有性能影响（之前看别人的帖子得到的反馈应该是没有太大的影响）

[SlipStupig]

@oyyd 有影响，但是很小，之前这个问题在我，我那个索引没建立，会非常慢

[SlipStupig]

@oyyd 数据不要直接构建到容器里面而是要放在磁盘上

[oyyd]

@SlipStupig 感谢告知

[swcat]

@SlipStupig 能力达不到😂