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Performance Monitoring - RHEL 7.4

 
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Old 08-21-2018
Well, i cannot say fascinated, since i've used it on home computer (fairly complex smartos environment with dozens of machines).

Currently i use Cacti, since i do not wish not to use agent software if
possible.
I just don't trust anyone Smilie
Check out the new Cacti, it's quite nice nowdays and even looks fancy.
SNMP is quite enough for 95% of monitoring. To bad is not widely accepted.

For else i have (for now) crontab with various stats* and plot.
This is for drill down analysis if required.

As for Prometheus, i actually love those kind of products you mention.
A lot of options and features, complex.

It's a kind of product you think upfront what you want, then fire and forget.

As for features - if we talk whole stack....

I like API - get graph with URL, inputting what you want directly into url.
When you draw a graph from gui it gives you a nice URL to use as well (or send around).

Language is not strange to me (GO), i personally like it and explored it a bit, should work on just any unix out there.

Alerting API is quite broad. From mails to endpoint API(s) to various stuff.

Last but not least, official client libs for java, ruby, go and scala.
Other unofficial in large numbers.
Include metrics in your apps is something i have yet to see from others Smilie
This can lower the debug time and/or expensive software such as dynatrace.

Since you are a ruby fan, take it for a spin Smilie

It's really fast with nginx infront(reverse proxy and internal load balancer), even on couple of AMD FM1 cores @ home, running that and dozens of smartos vms in virtualbox.

I'm willing to suggest this product to replace Cacti completely in my work environment, gradually for new projects.

I'm writing this as totally not affiliated with Prometheus or Cacti in any way.

Regards
Peasant.
 
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LEARN ABOUT FREEBSD

pmc_enable

PMC_ENABLE(3)						   BSD Library Functions Manual 					     PMC_ENABLE(3)

NAME

     pmc_disable, pmc_enable -- administrative control of hardware performance counters

LIBRARY

     Performance Counters Library (libpmc, -lpmc)

SYNOPSIS

     #include <pmc.h>

     int
     pmc_disable(int cpu, int pmc);

     int
     pmc_enable(int cpu, int pmc);

DESCRIPTION

     These functions allow specific hardware performance monitoring counters in a system to be disabled and enabled administratively.  The hard-
     ware performance counters available on each CPU are numbered using small non-negative integers, in a system dependent manner.  Disabled coun-
     ters will not be available to applications for use.

     The invoking process needs to have the PRIV_PMC_MANAGE privilege to perform these operations.

     Function pmc_disable() disables the hardware counter numbered by argument pmc on CPU number cpu.

     Function pmc_enable() enables the hardware counter numbered by argument pmc on CPU number cpu.

IMPLEMENTATION NOTES

     Hardware PMCs that are currently in use by applications cannot be disabled.  Allocation of a process scope software PMC marks all hardware
     PMCs in the system with the same pmc number as being in-use.

RETURN VALUES

     Upon successful completion, the value 0 is returned; otherwise the value -1 is returned and the global variable errno is set to indicate the
     error.

ERRORS

     A call to these functions may fail with the following errors:

     [EBUSY]		Function pmc_disable() specified a hardware PMC is currently in use.

     [EINVAL]		Arguments cpu or pmc were invalid.

     [ENXIO]		Argument cpu specified a disabled or absent CPU.

     [EPERM]		The current process lacks sufficient privilege to perform this operation.

SEE ALSO

     pmc(3), pmc_cpuinfo(3), pmc_pmcinfo(3), hwpmc(4), pmccontrol(8), priv_check(9)

BSD
								September 22, 2008							       BSD