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pmgperf.adoc: improve layout, add example

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Dietmar Maurer 2017-12-22 09:51:30 +01:00
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pmgperf.adoc
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@ -25,31 +25,46 @@ Proxmox Simple Performance Benchmark
:pmg-toplevel:
endif::manvolnum[]
This tool tries to gather some CPU/Hardisk performance data on the
hardisk (mounted at 'path').
The command line tool `pmgperf` tries to gather some general
performance data. This is mostly useful for debugging and to identify
performance bottlenecks. It computes the following metrics:
* CPU BOGOMIPS: bogomips sum of all CPUs
[horizontal]
CPU BOGOMIPS:: bogomips sum of all CPUs
* REGEX/SECOND: regular expressions per second (perl performance
test), should be above 300000
REGEX/SECOND:: regular expressions per second (perl performance
test), should be above 1000000.
* HD SIZE: harddisk size
HD SIZE:: harddisk size
* BUFFERED READS: simple HD read test. Modern HDs should reach at
least 40 MB/sec
BUFFERED READS:: simple HD read test. Modern HDs should reach at
least 100 MB/sec
* AVERAGE SEEK TIME: tests average seek time. Fast SCSI HDs reach
AVERAGE SEEK TIME:: tests average seek time. Fast SCSI HDs reach
values < 8 milliseconds. Common IDE/SATA disks get values from 15 to
20 ms. SSD seek times should be below 1ms.
* FSYNCS/SECOND: value should be greater than 200 (you should enable
FSYNCS/SECOND:: value should be greater than 200 (you should enable
'write back' cache mode on you RAID controller - needs a battery
backed cache (BBWC)).
* DNS EXT: average time to resolve an external DNS name
DNS EXT:: average time to resolve an external DNS name
* DNS INT: average time to resolve a local DNS name
DNS INT:: average time to resolve a local DNS name
Here is an example output generated by the tool:
----
# pmgperf
CPU BOGOMIPS: 16759.60
REGEX/SECOND: 1186304
HD SIZE: 60.78 GB (/dev/sda1)
BUFFERED READS: 209.84 MB/sec
AVERAGE SEEK TIME: 1.24 ms
FSYNCS/SECOND: 2198.79
DNS EXT: 35.69 ms
DNS INT: 1.41 ms (yourdomain.tld)
----
ifdef::manvolnum[]
include::pmg-copyright.adoc[]