dnlcstat - DNLC statistics. Uses DTrace. dnlcstat [interval [count]] The DNLC is the Directory Name Lookup Cache. Filename lookups often return a hit from here, before needing to traverse the regular file system cache or go to disk. Since this uses DTrace, only the root user or users with the dtrace_kernel privilege can run this command. Solaris unstable - this script uses fbt provider probes which may change for future updates of the OS, invalidating this script. Please read Docs/Notes/ALLfbt_notes.txt for further details about these fbt scripts.

Print DNLC statistics every second, # dnlcstat

Print every 5 seconds, 6 times, # dnlcstat 5 6

%hit hit percentage for this sample

hit number of DNLC hits in this sample

miss number of DNLC misses in this sample

See the CacheKit, http://www.brendangregg.com/cachekit.html for a version of dnlcstat written in Perl (Kstat) that uses much less CPU.

See the DTraceToolkit for further documentation under the Docs directory. The DTraceToolkit docs may include full worked examples with verbose descriptions explaining the output. dnlcstat will run until Ctrl-C is hit, or until the count argument has been satisfied. Brendan Gregg [Sydney, Australia] dtrace(1M)