Configuring Zing Memory with ZST

Complete the steps in Install Zing System Tools.

Configure Zing memory management using the system-config-zing-memory command. Zing requires a portion of host system memory to be set aside and managed independently from Linux.

Use the system-config-zing-memory wizard for initial configuration.

From the command line, type:

 
#system-config-zing-memory

The system responds:

 
Welcome to the Zing memory configuration wizard by Azul Systems.

This wizard sets up the Zing memory configuration file

/etc/zing/pmem.conf.0

and initializes System Zing memory. Read the man pages for zing, zing-zst, and zing-pmem-conf for more information about this configuration file.)

Use of System Zing Memory by Java processes running on the Zing VM requires you to configure memory in advance. This is analogous to reservation of memory for Linux hugepages, although System Zing Memory pages are not interchangeable with hugepages.

For most environments running Java applications on the Zing VM, Azul recommends configuring your system with 25% System Linux Memory and 75% System Zing Memory.

Choose yes to accept this default, or no to enter the wizard expert flow.
** accept default configuration
** (y)es or (n)o [default 'y']: y

Accept default configuration settings. At the prompt, type: y.

The system response lists the zing services that are started or restarted and memory configuration information.

For example:

 
zing-memory: INFO: Restarting...
zing-memory: INFO: Stopping...
zing-memory: INFO: stop successful
zing-memory: INFO: Starting...
Info: Zing Memory reserved using reserve-at-config policy.
Info: azulPmemPages: 54454.
INFO: az_pmem_reserve_pages (num2mPages 54454) succeeded
INFO: az_pmem_fund_transfer (to 7, from 0, bytes 114198315008) succeeded
INFO: az_pmem_fund_transfer (to 1, from 7, bytes 5708447744) succeeded
INFO: az_pmem_fund_transfer (to 3, from 7, bytes 5708447744) succeeded
INFO: az_pmem_fund_transfer (to 0, from 7, bytes 102781419520) succeeded
Info: You can now run Java processes up to -Xmx98020m or -Xmx95g.
Info: Azul pmem initialized successfully.
zing-memory: INFO: start successful
zing-memory: INFO: restart successful