#Update the optimization parameters

The platform supports filling in optimization parameters in Ceph configuration file format when creating a storage cluster, but does not provide a way to modify them through the interface after creation. You need to manually update them according to the following steps.

#Procedure

1. First, update the storage optimization parameters to the Configmap named rook-config-override-user, replace the .data.config field, and set the value of the .metadata.annotations[rook.cpaas.io/need-sync] field to true. For example:

   apiVersion: v1
   data:
     config: |
       [global]
       mon_memory_target=1073741824
       mds_cache_memory_limit=2147483648
       osd_memory_target=4147483648
   kind: ConfigMap
   metadata:
     annotations:
       cpaas.io/creator: admin
       cpaas.io/updated-at: "2022-03-01T12:24:04Z"
       rook.cpaas.io/need-sync: "true"
       rook.cpaas.io/sync-status: synced
     creationTimestamp: "2022-03-01T12:24:04Z"
     finalizers:
     - rook.cpaas.io/config-merge
     name: rook-config-override-user
     namespace: default
     resourceVersion: "38816864"
     uid: ce3a8f3e-6453-4bdd-bff0-e16cf7d5d5fa

2. Execute ceph tell [mon|osd|mgr|mds|rgw].* config set [key] [value] in the Pod of rook-ceph-tools to apply the configuration in real time.

3. To start the Pod of tools, edit the ClusterServiceVersion (CSV) under the rook-ceph namespace and set the replicas value of rook-ceph-tools in the Deployments section to 1.