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Feature #14012
open
ZFS memory usage graphs
Status:
New
Priority:
Normal
Assignee:
-
Category:
RRD Graphs
Target version:
-
Start date:
Due date:
% Done:
0%
Estimated time:
Release Notes:
Default
Description
It's becoming increasingly relevant for users to monitor ZFS memory usage, especially ARC usage. This is ideal as a separate RRD graph under Status > Monitoring but might also be a nice addition to the ZFS widget or a separate ZFS Memory widget.
Currently users have to look at the output of top to see it:
ARC: 1202M Total, 743M MFU, 384M MRU, 916K Anon, 14M Header, 59M Other
1041M Compressed, 3148M Uncompressed, 3.02:1 Ratio
Or dig through sysctl OIDs:
kstat.zfs.misc.arcstats.mfu_ghost_size: 0 kstat.zfs.misc.arcstats.mfu_size: 778736128 kstat.zfs.misc.arcstats.mru_ghost_size: 0 kstat.zfs.misc.arcstats.mru_size: 402139648 kstat.zfs.misc.arcstats.anon_size: 989184 kstat.zfs.misc.arcstats.other_size: 62153984 kstat.zfs.misc.arcstats.bonus_size: 13352960 kstat.zfs.misc.arcstats.dnode_size: 35653000 kstat.zfs.misc.arcstats.dbuf_size: 13148024 kstat.zfs.misc.arcstats.metadata_size: 138728448 kstat.zfs.misc.arcstats.data_size: 1043136512 kstat.zfs.misc.arcstats.hdr_size: 14482464 kstat.zfs.misc.arcstats.overhead_size: 90355200 kstat.zfs.misc.arcstats.uncompressed_size: 3300402688 kstat.zfs.misc.arcstats.compressed_size: 1091509760 kstat.zfs.misc.arcstats.size: 1260264224 kstat.zfs.misc.abdstats.linear_data_size: 114316288 kstat.zfs.misc.abdstats.scatter_data_size: 977197568 kstat.zfs.misc.abdstats.struct_size: 6681872
The exact set of data to graph is open for debate here, but we should at least go with the equivalent values to those shown in top output.
Updated by Patch Public almost 2 years ago
This feature request is probably related: zfs GUI functionality - alerts https://redmine.pfsense.org/issues/9226 but depending on the final implementation maybe separate and better integrated into the "Disk" widget
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