arc_summary.py require review to proper reflect actual value for ZoL #5526
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AndCycle
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p is the MRU target size, not the actual size I suggest if you are writing an agent to go directly to the arc.c source for details and get the values directly from the /proc/spl/kstat/zfs/* rather than an intermediary script such as arc_summary |
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that's what I am doing right now, as arc_summary.py is included in current ZoL, |
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Nasf-Fan
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Nov 4, 2017
Use mfu_size and mru_size pulled from the arcstats kstat file to calculate the mfu and mru percentages for arc size breakdown. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed-by: AndCycle <andcycle@andcycle.idv.tw> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes openzfs#5526 Closes openzfs#6770
Nasf-Fan
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Nov 6, 2017
Use mfu_size and mru_size pulled from the arcstats kstat file to calculate the mfu and mru percentages for arc size breakdown. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed-by: AndCycle <andcycle@andcycle.idv.tw> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes openzfs#5526 Closes openzfs#6770
tonyhutter
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Nov 21, 2017
Use mfu_size and mru_size pulled from the arcstats kstat file to calculate the mfu and mru percentages for arc size breakdown. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed-by: AndCycle <andcycle@andcycle.idv.tw> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes openzfs#5526 Closes openzfs#6770
Nasf-Fan
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Jan 29, 2018
Use mfu_size and mru_size pulled from the arcstats kstat file to calculate the mfu and mru percentages for arc size breakdown. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed-by: AndCycle <andcycle@andcycle.idv.tw> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes openzfs#5526 Closes openzfs#6770
Nasf-Fan
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Feb 13, 2018
Use mfu_size and mru_size pulled from the arcstats kstat file to calculate the mfu and mru percentages for arc size breakdown. Reviewed-by: George Melikov <mail@gmelikov.ru> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Richard Elling <Richard.Elling@RichardElling.com> Reviewed-by: AndCycle <andcycle@andcycle.idv.tw> Signed-off-by: Giuseppe Di Natale <dinatale2@llnl.gov> Closes openzfs#5526 Closes openzfs#6770
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this is just a note about this script,
as I am working with a munin plugin to proper present ZoL stats,
I found that arc_sumary.py is original written for FreeBSD,
and some of the arcstats it use to summarize the result is not actual value on ZoL.
for example,
pis stand for target size of MRUso it use
pasMRU size,size-pasMFU size,on ZoL we do have independent
mru_sizeandmfu_sizevalue,on my system
MRU sizeis far offpwhich result in wrong conclusion forARC Size Breakdown,so I think this script require some review.
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