HScarb commented on issue #573:
URL: https://github.com/apache/rocketmq/issues/573#issuecomment-948303407
> you just do that:
>
> 1. mqbroker.cmd -c broker.conf , borker.conf in ROCKETMQ_HOME/conf
> 2. in broker.conf, you can set diskMaxUsedSpaceRatio = 99, the default
value is 75.
>
> and i have a question, in class MessageStoreConfig, the property
diskMaxUsedSpaceRatio is not decorated by @ImportantField. what's means
@ImportantField? i just find some code:
>
> ```
> if (onlyImportantField) {
> Annotation annotation =
field.getAnnotation(ImportantField.class);
> if (null == annotation) {
> continue;
> }
> }
>
> if (logger != null) {
> logger.info(name + "=" + value);
> } else {
> }
> }
> }
> ```
>
> just for log? i dont' know.
I guess the `@ImportantField` is for logging important fields.
when calling `MaxAll.printObjectProperties(final InternalLogger logger,
final Object object, final boolean onlyImportantField)`, if you set
`onlyImportantField` as `true`, it will only log the `@ImportantField`
annotated fields of the `object`
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