我在仪表板上有许多面板（大约6个），以显示数据点图表，以查询PostgreSQL数据库的dockerized实例。
直到最近，面板都可以正常工作，有些面板停止工作并报告如下错误：
pq：无法将共享内存段“ /PostgreSQL.2058389254”的大小调整为12615680字节：设备上没有剩余空间
有人知道为什么吗？如何解决此问题。 Docker容器在通过ssh访问的远程主机上运行。
编辑
磁盘空间：
$df -h
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 197G 140G 48G 75% /
devtmpfs 1.4G 0 1.4G 0% /dev
tmpfs 1.4G 4.0K 1.4G 1% /dev/shm
tmpfs 1.4G 138M 1.3G 10% /run
tmpfs 1.4G 0 1.4G 0% /sys/fs/cgroup
/dev/dm-16 10G 49M 10G 1% /var/lib/docker/devicemapper/mnt/a0f3c5ab84aa06d5b2db00c4324dd6bf7141500ff4c83e23e9aba7c7268bcad4
/dev/dm-1 10G 526M 9.5G 6% /var/lib/docker/devicemapper/mnt/8623a774d736ed3dc0d2db89b7d07cae85c3d1bcafc245180eec4ffd738f93a5
shm 64M 0 64M 0% /var/lib/docker/containers/260552ebcdf2bf0961329108d3d975110f8ada0a41325f5e7dd81b8ddad9d18b/mounts/shm
/dev/dm-4 10G 266M 9.8G 3% /var/lib/docker/devicemapper/mnt/6f873e62607e7cac4c4b658c72874c787b90290f74d1159eca81af61cb467cfb
shm 64M 50M 15M 78% /var/lib/docker/containers/84c66d9fb5b6ae023d051766f4d35ced87a519a1fee68ca5c89d61ff87cf1e5a/mounts/shm
/dev/dm-2 10G 383M 9.7G 4% /var/lib/docker/devicemapper/mnt/cb3df1ae654ed78802c2e5bd7a51a1b0bdd562855a7c7803750b80b33f5c206e
shm 64M 0 64M 0% /var/lib/docker/containers/22ba2ae2b6859c24623703dcb596527d64257d2d61de53f4d88e00a8e2335211/mounts/shm
/dev/dm-3 10G 99M 9.9G 1% /var/lib/docker/devicemapper/mnt/492a19fc8f3e254c4e5cc691c3300b5fee9d1a849422673bf0c19b4b2d1db571
shm 64M 0 64M 0% /var/lib/docker/containers/39abe855a9b107d4921807332309517697f024b2d169ebc5f409436208f766d0/mounts/shm
/dev/dm-7 10G 276M 9.8G 3% /var/lib/docker/devicemapper/mnt/55c6a6c17c892d149c1cc91fbf42b98f1340ffa30a1da508e3526af7060f3ce2
shm 64M 0 64M 0% /var/lib/docker/containers/bf2e7254cd7e2c6000da61875343580ec6ff5cbf40c017a398ba7479af5720ec/mounts/shm
/dev/dm-8 10G 803M 9.3G 8% /var/lib/docker/devicemapper/mnt/4e51f48d630041316edd925f1e20d3d575fce4bf19ef39a62756b768460d1a3a
shm 64M 0 64M 0% /var/lib/docker/containers/72d4ae743de490ed580ec9265ddf8e6b90e3a9d2c69bd74050e744c8e262b342/mounts/shm
/dev/dm-6 10G 10G 20K 100% /var/lib/docker/devicemapper/mnt/3dcddaee736017082fedb0996e42b4c7b00fe7b850d9a12c81ef1399fa00dfa5
shm 64M 0 64M 0% /var/lib/docker/containers/9f2bf4e2736d5128d6c240bb10da977183676c081ee07789bee60d978222b938/mounts/shm
/dev/dm-5 10G 325M 9.7G 4% /var/lib/docker/devicemapper/mnt/65a2bf48cbbfe42f0c235493981e62b90363b4be0a2f3aa0530bbc0b5b29dbe3
shm 64M 0 64M 0% /var/lib/docker/containers/e53d5ababfdefc5c8faf65a4b2d635e2543b5a807b65a4f3cd8553b4d7ef2d06/mounts/shm
/dev/dm-9 10G 1.2G 8.9G 12% /var/lib/docker/devicemapper/mnt/3216c48346c3702a5cd2f62a4737cc39666983b8079b481ab714cdb488400b08
shm 64M 0 64M 0% /var/lib/docker/containers/5cd0774a742f54c7c4fe3d4c1307fc93c3c097a861cde5f611a0fa9b454af3dd/mounts/shm
/dev/dm-10 10G 146M 9.9G 2% /var/lib/docker/devicemapper/mnt/6a98acd1428ae670e8f1da62cb8973653c8b11d1c98a8bf8be78f59d2ddba062
shm 64M 0 64M 0% /var/lib/docker/containers/a878042353f6a605167e7f9496683701fd2889f62ba1d6c0dc39c58bc03a8209/mounts/shm
tmpfs 285M 0 285M 0% /run/user/0
EDIT-2
$df -ih
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/vda1 13M 101K 13M 1% /
devtmpfs 354K 394 353K 1% /dev
tmpfs 356K 2 356K 1% /dev/shm
tmpfs 356K 693 356K 1% /run
tmpfs 356K 16 356K 1% /sys/fs/cgroup
/dev/dm-16 10M 2.3K 10M 1% /var/lib/docker/devicemapper/mnt/a0f3c5ab84aa06d5b2db00c4324dd6bf7141500ff4c83e23e9aba7c7268bcad4
/dev/dm-1 10M 19K 10M 1% /var/lib/docker/devicemapper/mnt/8623a774d736ed3dc0d2db89b7d07cae85c3d1bcafc245180eec4ffd738f93a5
shm 356K 1 356K 1% /var/lib/docker/containers/260552ebcdf2bf0961329108d3d975110f8ada0a41325f5e7dd81b8ddad9d18b/mounts/shm
/dev/dm-4 10M 11K 10M 1% /var/lib/docker/devicemapper/mnt/6f873e62607e7cac4c4b658c72874c787b90290f74d1159eca81af61cb467cfb
shm 356K 2 356K 1% /var/lib/docker/containers/84c66d9fb5b6ae023d051766f4d35ced87a519a1fee68ca5c89d61ff87cf1e5a/mounts/shm
/dev/dm-2 10M 5.6K 10M 1% /var/lib/docker/devicemapper/mnt/cb3df1ae654ed78802c2e5bd7a51a1b0bdd562855a7c7803750b80b33f5c206e
shm 356K 1 356K 1% /var/lib/docker/containers/22ba2ae2b6859c24623703dcb596527d64257d2d61de53f4d88e00a8e2335211/mounts/shm
/dev/dm-3 10M 4.6K 10M 1% /var/lib/docker/devicemapper/mnt/492a19fc8f3e254c4e5cc691c3300b5fee9d1a849422673bf0c19b4b2d1db571
shm 356K 1 356K 1% /var/lib/docker/containers/39abe855a9b107d4921807332309517697f024b2d169ebc5f409436208f766d0/mounts/shm
/dev/dm-7 10M 7.5K 10M 1% /var/lib/docker/devicemapper/mnt/55c6a6c17c892d149c1cc91fbf42b98f1340ffa30a1da508e3526af7060f3ce2
shm 356K 1 356K 1% /var/lib/docker/containers/bf2e7254cd7e2c6000da61875343580ec6ff5cbf40c017a398ba7479af5720ec/mounts/shm
/dev/dm-8 10M 12K 10M 1% /var/lib/docker/devicemapper/mnt/4e51f48d630041316edd925f1e20d3d575fce4bf19ef39a62756b768460d1a3a
shm 356K 1 356K 1% /var/lib/docker/containers/72d4ae743de490ed580ec9265ddf8e6b90e3a9d2c69bd74050e744c8e262b342/mounts/shm
/dev/dm-6 7.9K 7.3K 623 93% /var/lib/docker/devicemapper/mnt/3dcddaee736017082fedb0996e42b4c7b00fe7b850d9a12c81ef1399fa00dfa5
shm 356K 1 356K 1% /var/lib/docker/containers/9f2bf4e2736d5128d6c240bb10da977183676c081ee07789bee60d978222b938/mounts/shm
/dev/dm-5 10M 27K 10M 1% /var/lib/docker/devicemapper/mnt/65a2bf48cbbfe42f0c235493981e62b90363b4be0a2f3aa0530bbc0b5b29dbe3
shm 356K 1 356K 1% /var/lib/docker/containers/e53d5ababfdefc5c8faf65a4b2d635e2543b5a807b65a4f3cd8553b4d7ef2d06/mounts/shm
/dev/dm-9 10M 53K 10M 1% /var/lib/docker/devicemapper/mnt/3216c48346c3702a5cd2f62a4737cc39666983b8079b481ab714cdb488400b08
shm 356K 1 356K 1% /var/lib/docker/containers/5cd0774a742f54c7c4fe3d4c1307fc93c3c097a861cde5f611a0fa9b454af3dd/mounts/shm
/dev/dm-10 10M 5.2K 10M 1% /var/lib/docker/devicemapper/mnt/6a98acd1428ae670e8f1da62cb8973653c8b11d1c98a8bf8be78f59d2ddba062
shm 356K 1 356K 1% /var/lib/docker/containers/a878042353f6a605167e7f9496683701fd2889f62ba1d6c0dc39c58bc03a8209/mounts/shm
tmpfs 356K 1 356K 1% /run/user/0
EDIT-3
postgres容器服务：
version: "3.5"
services:
#other containers go here..
postgres:
restart: always
image: postgres:10
hostname: postgres
container_name: fiware-postgres
expose:
- "5432"
ports:
- "5432:5432"
networks:
- default
environment:
- "POSTGRES_PASSWORD=password"
- "POSTGRES_USER=postgres"
- "POSTGRES_DB=postgres"
volumes:
- ./postgres-data:/var/lib/postgresql/data
build:
context: .
shm_size: '4gb'
数据库大小：
postgres=# SELECT pg_size_pretty( pg_database_size('postgres'));
pg_size_pretty
----------------
42 GB
(1 row)
EDIT-4
很抱歉，但与此问题相关的任何变通办法都无法正常工作，包括this one
在仪表板上，我有5个旨在显示数据点的面板。这些查询是相似的，除了每个查询显示针对temperature，relativeHumidity，illuminance，particles和O3的不同参数。这是查询：
SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800) as time,
avg(attrvalue::float) as illuminance
FROM urbansense.weather WHERE attrname='illuminance' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
区别在于WHERE attrname=#parameterValue语句。我修改了postgresql.conf文件以写入日志，但是日志似乎没有提供有用的提示：日志在这里：
$ vim postgres-data/log/postgresql-2019-06-26_150012.log
.
.
2019-06-26 15:03:39.298 UTC [45] LOG: statement: SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800) as time,
avg(attrvalue::float) as o3
FROM urbansense.airquality WHERE attrname='O3' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
2019-06-26 15:03:40.903 UTC [41] ERROR: could not resize shared memory segment "/PostgreSQL.1197429420" to 12615680 bytes: No space left on device
2019-06-26 15:03:40.903 UTC [41] STATEMENT: SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800) as time,
avg(attrvalue::float) as illuminance
FROM urbansense.weather WHERE attrname='illuminance' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
2019-06-26 15:03:40.905 UTC [42] FATAL: terminating connection due to administrator command
2019-06-26 15:03:40.905 UTC [42] STATEMENT: SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800) as time,
avg(attrvalue::float) as illuminance
FROM urbansense.weather WHERE attrname='illuminance' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
2019-06-26 15:03:40.909 UTC [43] FATAL: terminating connection due to administrator command
2019-06-26 15:03:40.909 UTC [43] STATEMENT: SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800) as time,
avg(attrvalue::float) as illuminance
FROM urbansense.weather WHERE attrname='illuminance' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
2019-06-26 15:03:40.921 UTC [1] LOG: worker process: parallel worker for PID 41 (PID 42) exited with exit code 1
2019-06-26 15:03:40.922 UTC [1] LOG: worker process: parallel worker for PID 41 (PID 43) exited with exit code 1
2019-06-26 15:07:04.058 UTC [39] LOG: temporary file: path "base/pgsql_tmp/pgsql_tmp39.0", size 83402752
2019-06-26 15:07:04.058 UTC [39] STATEMENT: SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800)as time,
avg(attrvalue::float) as relativeHumidity
FROM urbansense.weather WHERE attrname='relativeHumidity' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
2019-06-26 15:07:04.076 UTC [40] LOG: temporary file: path "base/pgsql_tmp/pgsql_tmp40.0", size 83681280
2019-06-26 15:07:04.076 UTC [40] STATEMENT: SELECT to_timestamp(floor((extract('epoch' from recvtime)/ 1800 )) * 1800)as time,
avg(attrvalue::float) as relativeHumidity
FROM urbansense.weather WHERE attrname='relativeHumidity' AND attrvalue<>'null' GROUP BY time ORDER BY time asc;
2019-06-26 15:07:04.196 UTC [38] LOG: temporary file: path "base/pgsql_tmp/pgsql_tmp38.0", size 84140032
有人知道如何解决这个问题吗？
答案 0 :(得分：6)
对不起，您的回复很晚。无需构建新映像。但是您必须确保重新创建了容器，并且您没有使用旧的容器。
必须更改Docker-compose文件，并在服务级别添加shm_size。不需要构建部分。
version: "3.5"
services:
#other containers go here..
postgres:
restart: always
image: postgres:10
#THIS MUST BE ADDED AT SERVICE LEVEL
shm_size: 1gb
hostname: postgres
container_name: fiware-postgres
expose:
- "5432"
ports:
- "5432:5432"
networks:
- default
environment:
- "POSTGRES_PASSWORD=password"
- "POSTGRES_USER=postgres"
- "POSTGRES_DB=postgres"
volumes:
- ./postgres-data:/var/lib/postgresql/data
那你必须做
docker-compose down
docker-compose up -d
摧毁旧容器并创建一个新容器。
您可以检查容器内的更改（用docker-compose exec postgres bash输入）并运行df -h | grep shm
答案 1 :(得分：1)
您需要使用增加的shm_size构建新图像
Dockerfile
FROM postgres:10.7
docker-compose.release.yml
version: '3.7'
services:
postgres:
image: registry.my-site.com/postgres:latest
build:
shm_size: '4gb'
运行
docker-compose -f docker-compose.release.yml build
然后，您可以使用映像registry.my-site.com/postgres:latest来部署增加了shm_size的容器
答案 2 :(得分：1)
您可以通过重新安装shm来增加它的大小，而无需重新启动/重建容器
mount -o remount,size=256m -t tmpfs /var/lib/docker/containers/your-container-id/mounts/shm
更改您的容器ID和所需的大小（256m）
答案 3 :(得分：0)
这是因为docker by-default将共享内存的大小限制为64MB。
您可以使用--shm-size中的docker run选项覆盖此默认值。
docker run -itd --shm-size=1g postgres
希望这会有所帮助。