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Expose /proc/pressure (#1261)

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This enables the collection of pressure stall information as exposed
by the `/proc/pressure` interface added in the 4.20 release of the
Linux kernel.

Closes #1174

Signed-off-by: Daniele Sluijters <daenney@users.noreply.github.com>
This commit is contained in:
Daniele Sluijters 2019-04-18 11:19:20 +01:00 • committed by Ben Kochie
commit cc2fd82008
9 changed files with 145 additions and 0 deletions
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16
collector/fixtures/e2e-64k-page-output.txt
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@ -2289,6 +2289,21 @@ node_nfsd_server_rpcs_total 18628
# HELP node_nfsd_server_threads Total number of NFSd kernel threads that are running.
# TYPE node_nfsd_server_threads gauge
node_nfsd_server_threads 8
# HELP node_pressure_cpu_waiting_seconds_total Total time in seconds that processes have waited for CPU time
# TYPE node_pressure_cpu_waiting_seconds_total counter
node_pressure_cpu_waiting_seconds_total 14.036781000000001
# HELP node_pressure_io_stalled_seconds_total Total time in seconds no process could make progress due to IO congestion
# TYPE node_pressure_io_stalled_seconds_total counter
node_pressure_io_stalled_seconds_total 159.229614
# HELP node_pressure_io_waiting_seconds_total Total time in seconds that processes have waited due to IO congestion
# TYPE node_pressure_io_waiting_seconds_total counter
node_pressure_io_waiting_seconds_total 159.886802
# HELP node_pressure_memory_stalled_seconds_total Total time in seconds no process could make progress due to memory congestion
# TYPE node_pressure_memory_stalled_seconds_total counter
node_pressure_memory_stalled_seconds_total 0
# HELP node_pressure_memory_waiting_seconds_total Total time in seconds that processes have waited for memory
# TYPE node_pressure_memory_waiting_seconds_total counter
node_pressure_memory_waiting_seconds_total 0
# HELP node_processes_max_processes Number of max PIDs limit
# TYPE node_processes_max_processes gauge
node_processes_max_processes 123
@ -2361,6 +2376,7 @@ node_scrape_collector_success{collector="netdev"} 1
node_scrape_collector_success{collector="netstat"} 1
node_scrape_collector_success{collector="nfs"} 1
node_scrape_collector_success{collector="nfsd"} 1
node_scrape_collector_success{collector="pressure"} 1
node_scrape_collector_success{collector="processes"} 1
node_scrape_collector_success{collector="qdisc"} 1
node_scrape_collector_success{collector="sockstat"} 1