Update latest release section for 0.40.0

[Sreekala-Gopakumar]

What's New update for the website, for 0.40.0 (July 2023)

[Sreekala-Gopakumar]

First draft (0.39.0 content is live at https://www.eclipse.org/openj9). Note: this isn't an exhaustive list of all the changes, just the main ones:

Eclipse OpenJ9 version 0.40.0 released

July 2023

We're pleased to announce the availability of Eclipse OpenJ9™ v0.40.0.

This release supports OpenJDK 8, 11, 17, and 20. For more information about supported platforms and OpenJDK versions, see Supported environments.

Other update in this release include the following:

• Support for persistent shared classes cache is now added on z/OS® systems.
• A new -XX:codecachetotalMaxRAMPercentage option is added to set the maximum limit for the total JIT code cache size based on the amount of physical memory available to the VM.
• Even though the container detection fails when you mount the /proc file system with the hidepid=2 option on Linux® platforms, the VM starts but with a warning message.

To read more about these and other changes, see the OpenJ9 user documentation.

[Sreekala-Gopakumar]

@pshipton @vijaysun-omr @mpirvu @dsouzai @hangshao0 @babsingh Are there any performance updates that you want to highlight in the website? Any other what's new update to be added here? Thanks!

[babsingh]

Are there any performance updates that you want to highlight in the website?

None from my end for this cycle.

Revised note on container detection:

Even though container detection fails when the /proc filesystem is mounted with the hidepid=2 option on Linux platforms, the VM will start but with a warning message.

[Sreekala-Gopakumar]

@pshipton @vijaysun-omr @mpirvu @dsouzai @hangshao0 - Any other updates? If there are none then I can go ahead and create the updated file for 0.40.0 release. Thanks!

[hangshao0]

Any other updates?

Nothing from me.

[dsouzai]

Nothing from me.

[pshipton]

It's fine with me.

[Sreekala-Gopakumar]

@vijaysun-omr @mpirvu - Are there any performance updates that you want to highlight in the website? Thanks!

[mpirvu]

Nothing from my side

[vijaysun-omr]

No new updates, I believe the enabling of string compression by default missed this release and so I don't know of other major changes to be called out.