Memory exhausted, memory_limit has no effect

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My Mautic version is: Docker image 5.2.4-apache
My PHP version is: 8.1.32
My Database type and version is: Mysql 8.0

Hello,

I know it has been posted many times in the forum, and I went through all the threads and solutions I could find, but nothing has fixed the issue. Where does the value 134217728/128M come from? Is there any other memory config I can change?

These errors are showing in the log:

mautic-cron    | [08-May-2025 15:08:03 UTC] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 47745808 bytes) in /var/www/html/vendor/symfony/messenger/Transport/Serialization/PhpSerializer.php on line 42
mautic-cron    | 
mautic-cron    | Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 47745808 bytes) in /var/www/html/vendor/symfony/messenger/Transport/Serialization/PhpSerializer.php on line 42
mautic-cron    | 
mautic-cron    | In PhpSerializer.php line 42:
mautic-cron    |                                                                                
mautic-cron    |   Error: Allowed memory size of 134217728 bytes exhausted (tried to allocate   
mautic-cron    |   47745808 bytes)                                                              
mautic-cron    |                                                                                
mautic-cron    | 
mautic-cron    | mautic:campaigns:trigger [-i|--campaign-id [CAMPAIGN-ID]] [--campaign-limit [CAMPAIGN-LIMIT]] [--contact-id [CONTACT-ID]] [--contact-ids [CONTACT-IDS]] [--min-contact-id [MIN-CONTACT-ID]] [--max-contact-id [MAX-CONTACT-ID]] [--thread-id [THREAD-ID]] [--max-threads [MAX-THREADS]] [--kickoff-only] [--scheduled-only] [--inactive-only] [-l|--batch-limit [BATCH-LIMIT]] [-d|--exclude [EXCLUDE]] [--bypass-locking] [-t|--timeout TIMEOUT] [-x|--lock_mode LOCK_MODE] [-f|--force]
mautic-cron    | 
mautic-cron    | [08-May-2025 15:08:05 UTC] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/docroot/app/bundles/LeadBundle/Entity/CustomFieldRepositoryTrait.php on line 100
mautic-cron    | 
mautic-cron    | Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 20480 bytes) in /var/www/html/docroot/app/bundles/LeadBundle/Entity/CustomFieldRepositoryTrait.php on line 100
mautic-cron    | [08-May-2025 15:08:05 UTC] PHP Fatal error:  Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/vendor/monolog/monolog/src/Monolog/DateTimeImmutable.php on line 1
mautic-cron    | 
mautic-cron    | Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 32768 bytes) in /var/www/html/vendor/monolog/monolog/src/Monolog/DateTimeImmutable.php on line 1

Steps I have tried to fix the problem:

  • Set PHP_INI_VALUE_MEMORY_LIMIT=4096M in .mautic_env and checked the System Info page that it was applied.

  • The VPS where mautic is hosted has 8gb of RAM. Checked docker and it doesn’t seem to be limited.
    docker stats

  • Searched other memory configs where the value is set to 128M, like opcache.memory_consumption, set it manually to 1024.

docker-compose.yml

x-mautic-volumes:
  &mautic-volumes
  - ./mautic/config:/var/www/html/config:z
  - ./mautic/logs:/var/www/html/var/logs:z
  - ./mautic/media/files:/var/www/html/docroot/media/files:z
  - ./mautic/media/images:/var/www/html/docroot/media/images:z
  - ./mautic/themes:/var/www/html/docroot/themes:rw
  - ./cron:/opt/mautic/cron:z

services:
  db:
    image: mysql:8.0
    container_name: mautic-db
    environment:
      - MYSQL_ROOT_PASSWORD=${MYSQL_ROOT_PASSWORD}
      - MYSQL_DATABASE=${MYSQL_DATABASE}
      - MYSQL_USER=${MYSQL_USER}
      - MYSQL_PASSWORD=${MYSQL_PASSWORD}
    volumes:
      - ./mysql-data:/var/lib/mysql
      - ./mysql-conf.d:/etc/mysql/conf.d
    healthcheck:
      test: mysqladmin --user=$$MYSQL_USER --password=$$MYSQL_PASSWORD ping
      start_period: 5s
      interval: 5s
      timeout: 5s
      retries: 10
    networks:
      - default
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
    restart: unless-stopped

  mautic_web:
    image: mautic/mautic:5.2.4-apache
    container_name: mautic-web
    links:
      - db:mysql
    volumes: *mautic-volumes
    environment:
      - DOCKER_MAUTIC_LOAD_TEST_DATA=${DOCKER_MAUTIC_LOAD_TEST_DATA}
      - DOCKER_MAUTIC_RUN_MIGRATIONS=${DOCKER_MAUTIC_RUN_MIGRATIONS}
    env_file:
      - .mautic_env
    healthcheck:
      test: curl http://localhost
      start_period: 5s
      interval: 5s
      timeout: 5s
      retries: 100
    depends_on:
      db:
        condition: service_healthy
    networks:
      - default
      - caddy-net
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
    restart: unless-stopped

  mautic_cron:
    image: mautic/mautic:5.2.4-apache
    container_name: mautic-cron
    links:
      - db:mysql
    volumes: *mautic-volumes
    environment:
      - DOCKER_MAUTIC_ROLE=mautic_cron
    env_file:
      - .mautic_env
    depends_on:
      mautic_web:
        condition: service_healthy
    networks:
      - default
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
    restart: unless-stopped

  mautic_worker:
    image: mautic/mautic:5.2.4-apache
    container_name: mautic-worker
    links:
      - db:mysql
    volumes: *mautic-volumes
    environment:
      - DOCKER_MAUTIC_ROLE=mautic_worker
    env_file:
      - .mautic_env
    depends_on:
      mautic_web:
        condition: service_healthy
    networks:
      - default
    logging:
      driver: "json-file"
      options:
        max-size: "10m"
    restart: unless-stopped

networks:
  caddy-net:
    name: caddy-net
    external: true
  default:
    name: ${COMPOSE_PROJECT_NAME}-docker
    driver: bridge