# Topic Parameter Configuration

In the Topic management interface, click on 【Update Configuration】.

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Or select multiple Topics to update configurations in batch.

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> The changes to Topic parameters take effect immediately, no need to restart the cluster.

## Description of Topic Parameters

| Parameter Name     | Parameter Type | Parameter Range       | Description       |
| ----------- | -------- | -------------- | ----------- |
| cleanup.policy       | string  | delete/compact    | Log cleanup policy  |
| max.message.bytes    | int  | 1-2147483647    | The maximum size of a single message |
| min.insync.replicas  | int  | 1-100    | Valid when producer sets request.required.acks=-1, the minimum number of synchronized replicas. |
| retention.bytes     | long  | -1-2^64-1 | The maximum size of log retention |
| retention.ms        | long | -1-2^64-1 | Log retention time (milliseconds) |