Oracle Solaris ZFS File System (MOSC)

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How to limit ZFS arc cache size on Solaris

edited May 27, 2020 10:25PM in Oracle Solaris ZFS File System (MOSC) 8 commentsAnswered ✓

Hi Expert,

From Ldom i have memory performance issue where Zfs ARC uses 60% of total memory and the other 10% were used by zone and oracle database,

as the following output ( zfs used 145Gb of ram and apps used 71G )

#  echo "::memstat" | mdb -kw

Usage Type/Subtype                      Pages    Bytes  %Tot  %Tot/%Subt

---------------------------- ---------------- -------- ----- -----------

ZFS                                  19061406   145.4g 55.0%  --> zfs cache

User/Anon                             9322025    71.1g 26.9%  --> Application

currenttly  memory setting as below :

- Ldom :  ram=290g,swap=290g

- zone :  ram=256g,swap=256g ( shared )

i have performed the action plan to adjust  the following parameter at /etc/system file and reboot solaris opearting system :

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