Since I switched to OpenJDK 1.8 (linux debian, openjdk version "1.8.0_242"), I encountered a lot of issue with filesystem usage.
The CPU has really high usage peaks, over 150%, by only browsing files in applications like netbeans (8 to 11) and every other java apps that reads directories contents, resulting in a system slowdown after a bit.
The problem seems to be not present in the Oracle JRE 1.8 bundled with old netbeans 8.2 (java version "1.8.0_101").
I attached a screenshot. Netbeans 11 cpu usage
Has anyone else experienced this?