Shared Memory settings is not picked up

[TieyanFu]

Expected Behaviour
We are trying to set shared_buffers parameter with following codes

const postgresContainer = new GenericContainer('postgres:14.3-bullseye')
  .withSharedMemorySize(256 * 1024 * 1024)
  .withUser('postgres')
  .withEnvironment({
    POSTGRES_PASSWORD: 'xxxx',
    POSTGRES_DB: 'idmp',
  })
  .withExposedPorts(5432)
  .withHealthCheck({
    test: ['CMD-SHELL', 'pg_isready'],
    interval: 5000,
    timeout: 1000,
    retries: 5,
  })
  .withWaitStrategy(Wait.forHealthCheck());
console.debug(postgresContainer);
const startedTestContainer = await postgresContainer.start();

Actual Behaviour
Below logs show that ShmSize picks up the value 268435456 (256MB), however, further down the logs testcontainers select default value of 128MB.

Testcontainer Logs

GenericContainer {
  createOpts: {
    Image: 'postgres:14.3-bullseye',
    User: 'postgres',
    Env: [ 'POSTGRES_PASSWORD=example', 'POSTGRES_DB=idmp' ],
    ExposedPorts: { '5432': {} },
    Healthcheck: {
      Test: [Array],
      Interval: 5000000000,
      Timeout: 1000000000,
      Retries: 5,
      StartPeriod: 0
    }
  },
  hostConfig: {
    AutoRemove: false,
    **ShmSize: 268435456,**
    PortBindings: { '5432': [Array] }
  },
  imageName: ImageName {
    registry: undefined,
    image: 'postgres',
    tag: '14.3-bullseye',
    string: 'postgres:14.3-bullseye'
  },

testcontainers:containers [9ebe0f3e24e2] fixing permissions on existing directory /var/lib/postgresql/data ... ok +0ms
testcontainers:containers [9ebe0f3e24e2] creating subdirectories ... ok +1ms
testcontainers:containers [9ebe0f3e24e2] selecting dynamic shared memory implementation ... posix +0ms
testcontainers:containers [9ebe0f3e24e2] selecting default max_connections ... 100 +17ms
testcontainers:containers [9ebe0f3e24e2] selecting default shared_buffers ... 128MB +22ms
testcontainers:containers [9ebe0f3e24e2] selecting default time zone ... Etc/UTC +17ms
testcontainers:containers [9ebe0f3e24e2] creating configuration files ... ok +1ms
testcontainers [DEBUG] [9ebe0f3e24e2] Inspecting container... +102ms
testcontainers [DEBUG] [9ebe0f3e24e2] Inspected container +4ms

Steps to Reproduce

1. In this environment...
2. With this config...
3. Run '...'
4. See error...

Environment Information

• Operating System: MacOS 13.5.2 (22G91)
• Docker Version: 20.10.8
• Node version: v18.17.1
• Testcontainers version: 10.2.1

[cristianrgreco]

Hi @TieyanFu, the shared memory size is correctly being set by Docker, however I believe that Postgres also needs to be configured to use shared buffers which is currently outside the scope of Testcontainers.