-Xcompressedrefs / -Xnocompressedrefs
(64-bit only)
These options enable or disable the use of compressed references.
Restriction: You cannot include -Xcompressedrefs in the options file (see -Xoptionsfile).
Syntax
| Setting | Action | Default |
|---|---|---|
-Xcompressedrefs |
Enable compression | yes (see Default behavior) |
-Xnocompressedrefs |
Disable compression |
Default behavior
Compressed references are enabled by default when -Xmx ≤ 57 GB.
z/OS®: This threshold value assumes that you have APAR OA49416 installed. If you do not have the APAR installed, the threshold value is 25 GB.
AIX® and Linux®: For the metronome garbage collection policy, the threshold is 25 GB.