[jdk21u-dev] RFR: 8318479: [jmh] the test security.CacheBench failed for multiple threads run

[SendaoYan]

Hi all,
  This is backport parity with 21.0.5-oracle, remove the hardcoded maximum heap size, to avoid OOM fail with 100+ threads.

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Commit messages:
 - Backport 1535528cb119195b44244e8ee6bc0f913caa9270

Changes: https://git.openjdk.org/jdk21u-dev/pull/606/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=606&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8318479
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/606.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/606/head:pull/606

PR: https://git.openjdk.org/jdk21u-dev/pull/606