I found an error description in the document #1883
Description
Description
In the second example of Delete on Rollover, 100 archives will be retained on the same hour, not day. Cause the filePattern is "${baseDir}/$${date:yyyy-MM}/app-%d{yyyy-MM-dd-HH}-%i.log.gz", it will reset count to 0 at every hour.
The Original Text:
Below is a sample configuration that uses a RollingFileAppender with both the time and size based triggering policies, will create up to 100 archives on the same day (1-100) that are stored in a directory based on the current year and month
Should be corrected to: ... on the same day hour (1-100) ...