PostgreSQL基于Docker部署时的shm配置注意事项

背景
如果你使用docker启动PG时，遇到类似这样的问题，可能你需要看看docker的/dev/shm是不是不够大。

"ERROR: could not resize shared memory segment "/PostgreSQL.388782411" to 50438144 bytes: No space left on device SQL state: 53100"

调整docker启动参数--shm-size

Thank you Thomas,  
   
I make it work with extra setting --shm-size=1g in my docker run script.  
   
   
It works with 'none' and 'sysv'--I think the issue is that technically our 
environment does support 'posix', but '/dev/shm' is indeed not mounted in 
the LXC container, leading to a discrepancy between what initdb decides and 
what's actually possible. Thanks for your help. 
   
Thanks, 
Maciek
docker-compose配置例子:

version: "3.1"
services:
  db:
    image: postgres
    environment:
      POSTGRES_PASSWORD: Boe888888
      POSTGRES_USER: sdm-admin
      POSTGRES_DB: sdm
      TZ: Asia/Shanghai
      shm-size: 1g
 
    ports:
      - 15432:5432
    volumes:
      - /home/docker/sdm/data:/var/lib/postgresql/data