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uses Perl to extract, format, and display kstats from the ZFS ARC
This project forked from pijewski/arcstat
uses Perl to extract, format, and display kstats from the ZFS ARC
arcstat.pl is a Perl script that uses the Sun::Solaris::Kstat module to read ZFS ARC kstat values from the system and report on an interval basis. Some output examples can be found on the author's blog here: http://blogs.sun.com/realneel/entry/zfs_arc_statistics Examples showing L2ARC data can be found here: http://blog.harschsystems.com/tools/arcstat-pl-updated-for-l2arc-statistics/ Note: L2ARC statistics are only available on systems that have implemented the L2ARC (i.e. nevada-based releases). Usage for arcstat.pl can be obtained by providing the "--help" flag: ./arcstat.pl --help Arcstat version 0.4 Usage: arcstat.pl [-hvx] [-f fields] [-o file] [interval [count]] -x : Print extended stats -f : Specify specific fields to print (see -v) -o : Print stats to file -s : Specify a seperator Examples: arcstat -o /tmp/a.log 2 10 arcstat -s , -o /tmp/a.log 2 10 arcstat -v arcstat -f time,hit%,dh%,ph%,mh% Available fields (statistics) can be retrieved with the "-v" flag: ./arcstat.pl -v Arcstat version 0.4 Usage: arcstat.pl [-hvx] [-f fields] [-o file] [interval [count]] Field definitions are as follows mtxmis : mutex_miss per second arcsz : Arc Size mrug : MRU Ghost List hits per second l2hit% : L2ARC access hit percentage mh% : Metadata hit percentage l2miss% : L2ARC access miss percentage read : Total Arc accesses per second c : Arc Target Size mfug : MFU Ghost List hits per second miss : Arc misses per second dm% : Demand Data miss percentage dhit : Demand Data hits per second pread : Prefetch accesses per second dread : Demand data accesses per second pmis : Prefetch misses per second l2miss : L2ARC misses per second time : Time l2bytes : bytes read per second from the L2ARC pm% : Prefetch miss percentage mm% : Metadata miss percentage hits : Arc reads per second mfu : MFU List hits per second l2read : Total L2ARC accesses per second mmis : Metadata misses per second rmis : recycle_miss per second mhit : Metadata hits per second dmis : Demand Data misses per second mru : MRU List hits per second ph% : Prefetch hits percentage eskip : evict_skip per second l2size : Size of the L2ARC l2hits : L2ARC hits per second hit% : Arc Hit percentage miss% : Arc miss percentage dh% : Demand Data hit percentage mread : Metadata accesses per second phit : Prefetch hits per second
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