Comments (3)
nebhale
commented on June 13, 2024
This calculation was intentionally removed three-and-a-half years ago. There were a number of problems related to starting with a large -Xms given that once a JVM requests memory from an operating system, it will never release it.
This had side effects such as preventing a Cloud Foundry installation that was made up primarily of Java applications from every overcommitting memory in the Diego cells and preventing auto-scaling from ever detecting when a JVM-based application was really near the limit and needing to be scaled.
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nebhale
commented on June 13, 2024
Since there's been no response on this issue in a couple of weeks, I'm going to close it. If you'd like to see it re-opened, please comment on the issue and I'll reopen it.
from java-buildpack-memory-calculator.
shashidhar-sripathi
commented on June 13, 2024
It seems fair amount of our applications required explicitly set Xms and few of them have to increase default XX:MaxDirectMemorySize. We are fine to set these manually for now..
from java-buildpack-memory-calculator.
Related Issues (20)
- Impossible to compute configuration for Boot application and 256M total memory HOT 1
- Getting java.lang.OutOfMemoryError: Java heap space when using Spring kafka to produce a message HOT 1
- Adjust ReservedCodeCacheSize HOT 1
- Getting way too low Xmx numbers with a regular Spring Boot app HOT 1
- Does option "--head-room" represents "native" memory HOT 2
- Heuristics to compute Xms (min heap size) value HOT 3
- Calculation Default Values: ReservedCodeCache is NOT 240MB? HOT 2
- Cannot get latest version: module contains a go.mod file, so module path should be github.com/cloudfoundry/java-buildpack-memory-calculator/v4 HOT 6
- Take garbage collector into account HOT 1
- Calculated JVM memory configuration is propably wrong
- Taking into account frameworks like Dynatrace OneAgent HOT 1
- Allow to specify ratio of allocation of available memory between heap and direct memory HOT 6
- Allow to specify ratio of allocation of available memory to young generation in heap HOT 2
- Documentation link in readme is broken HOT 5
- Buildback-memory-calculator HOT 1
- Possibility to override memory instead of detection HOT 1
- Please, provide Windows compiled application HOT 1
- Question: Why is -XX:MaxDirectMemorySize set to 10M by default? HOT 1
- Provide Arm64 Executable
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