What is the difference between CMSInitiatingOccupancyFraction and CMSTriggerRatio in the Java: JVM parameter?

what"s the difference between CMSInitiatingOccupancyFraction and CMSTriggerRatio
as the name implies, it feels like the same concept

Oct.07,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e964c8-473a9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e964c8-473a9.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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