Enable Redis slave connection
Enable a Redis slave connection in the .magento.env.yaml
configuration file to allow only one node to handle read-write traffic while the other nodes handle the read-only traffic.
stage:
deploy:
REDIS_USE_SLAVE_CONNECTION: true
See REDIS_USE_SLAVE_CONNECTION in the Commerce on Cloud Infrastructure Guide.
For Adobe Commerce on-premises installations, configure the new Redis cache implementation using the bin/magento:setup
commands. See Use Redis for default cache in the Configuration Guide.
Pre-load keys
To reuse data between pages, list the keys for preload in the .magento.env.yaml
configuration file.
stage:
deploy:
REDIS_BACKEND: '\Magento\Framework\Cache\Backend\RemoteSynchronizedCache'
CACHE_CONFIGURATION:
_merge: true
frontend:
default:
id_prefix: '061_' # Prefix for keys to be preloaded
backend_options:
preload_keys: # List the keys to be preloaded
- '061_EAV_ENTITY_TYPES:hash'
- '061_GLOBAL_PLUGIN_LIST:hash'
- '061_DB_IS_UP_TO_DATE:hash'
- '061_SYSTEM_DEFAULT:hash'
For on-premises installations, see Redis preload feature in the Configuration Guide.
Enable stale cache
Reduce lock waiting times and enhance performance—especially when dealing with numerous Blocks and Cache keys—by using an outdated cache while generating a new cache in parallel. Enable stale cache and define cache types in the .magento.env.yaml
configuration file:
stage:
deploy:
REDIS_BACKEND: '\Magento\Framework\Cache\Backend\RemoteSynchronizedCache'
CACHE_CONFIGURATION:
_merge: true
default:
backend_options:
use_stale_cache: false
stale_cache_enabled:
backend_options:
use_stale_cache: true
type:
default:
frontend: "default"
layout:
frontend: "stale_cache_enabled"
block_html:
frontend: "stale_cache_enabled"
reflection:
frontend: "stale_cache_enabled"
config_integration:
frontend: "stale_cache_enabled"
config_integration_api:
frontend: "stale_cache_enabled"
full_page:
frontend: "stale_cache_enabled"
translate:
frontend: "stale_cache_enabled"
full_page
cache is not relevant to Adobe Commerce on cloud infrastructure projects, because they use Fastly.For configuring on-premises installations, see Stale cache options in the Configuration Guide.
Separate Redis cache and session instances
Separating the Redis cache from Redis session allows you to manage the cache and sessions independently. It prevents cache issues from affecting sessions, which could impact revenue. Each Redis instance runs on its own core, which improves performance.
-
Update the
.magento/services.yaml
configuration file.mysql: type: mysql:10.4 disk: 35000 redis: type: redis:6.0 redis-session: # This is for the new Redis instance type: redis:6.0 search: type: elasticsearch:7.9 disk: 5000 rabbitmq: type: rabbitmq:3.8 disk: 2048
-
Update the
.magento.app.yaml
configuration file.relationships: database: "mysql:mysql" redis: "redis:redis" redis-session: "redis-session:redis" # Relationship of the new Redis instance search: "search:elasticsearch" rabbitmq: "rabbitmq:rabbitmq"
-
Submit an Adobe Commerce Support ticket to request the provisioning of a new Redis instance dedicated to sessions on Production and Staging environments. Include the updated
.magento/services.yaml
and.magento.app.yaml
configuration files. This won’t cause any downtime, but it requires a deployment to activate the new service. -
Verify that the new instance is running and make a note of the port number.
echo $MAGENTO_CLOUD_RELATIONSHIPS | base64 -d | json_pp
-
Add the port number to the
.magento.env.yaml
configuration file.IMPORTANT
Configure the redis session port only ifece-tools
is unable to automatically detect it from theMAGENTO_CLOUD_RELATIONSHIPS
redis session service definition.NOTE
disable_locking
must be set to1
.SESSION_CONFIGURATION: _merge: true redis: port: 6374 # check the port in $MAGENTO_CLOUD_RELATIONSHIPS and put it here (by default, you can delete this line!!) timeout: 5 disable_locking: 1 bot_first_lifetime: 60 bot_lifetime: 7200 max_lifetime: 2592000 min_lifetime: 60
-
Remove sessions from the default database (
db 0
) on the Redis cache instance.redis-cli -h 127.0.0.1 -p 6374 -n 0 FLUSHDB
During deployment, you should see the following lines in the build and deploy log:
W: - Downloading colinmollenhour/credis (1.11.1)
W: - Downloading colinmollenhour/php-redis-session-abstract (v1.4.5)
...
W: - Installing colinmollenhour/credis (1.11.1): Extracting archive
W: - Installing colinmollenhour/php-redis-session-abstract (v1.4.5): Extracting archive
...
[2022-08-17 01:13:40] INFO: Version of service 'redis' is 6.0
[2022-08-17 01:13:40] INFO: Version of service 'redis-session' is 6.0
[2022-08-17 01:13:40] INFO: redis-session will be used for session if it was not override by SESSION_CONFIGURATION
Cache compression
If you are using over 6GB of Redis maxmemory
, you can use cache compression to reduce the space consumed by the keys. Be aware that there is a trade-off with client-side performance. If you have spare CPUs, enable it. See Use Redis for session storage in the Configuration Guide.
stage:
deploy:
REDIS_BACKEND: '\Magento\Framework\Cache\Backend\RemoteSynchronizedCache'
CACHE_CONFIGURATION:
_merge: true;
frontend:
default:
backend_options:
compress_data: 4 # 0-9
compress_tags: 4 # 0-9
compress_threshold: 20480 # don't compress files smaller than this value
compression_lib: 'gzip' # snappy and lzf for performance, gzip for high compression (~69%)