OOM error w/ VertexAI native image builds

[burkedavison]

https://fusion2.corp.google.com/invocations/d49b6be3-bfa7-4285-bbd4-105206b97ec4/targets/cloud-devrel%2Fclient-libraries%2Fjava%2Fgoogle-cloud-java%2Fnightly%2Fgraalvm-sub-jobs%2Fnative-a%2Fgraalvm-native-5;config=default/log

[6/8] Compiling methods...    [***************]                                                        (244.1s @ 5.62GB)
#
# There is insufficient memory for the Java Runtime Environment to continue.
# Native memory allocation (mmap) failed to map 1789394944 bytes for committing reserved memory.
# An error report file with more information is saved as:
# /tmpfs/src/github/google-cloud-java/hs_err_pid6313.log
OpenJDK 64-Bit Server VM warning: INFO: os::commit_memory(0x0000000615280000, 1789394944, 0) failed; error='Not enough space' (errno=12)

[burkedavison]

I've changed the machine pool to cloud-java-graalvm. If we continue to see this OOM error, we can adjust the machine's instance type to increase available memory. See cl/709802858 for more information.

[burkedavison]

Reverting pool change, as the current project it runs on doesn't have sufficient quota to run all nightlies in parallel without hitting deadline limits.