I have high load - so what (in polish) ?

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Łukasz Filut

Presentation from www.futureshapers.tech conference with answers to question - how create efficient metrics.

Technology

A: - MAM WYSOKI LOAD
Łukasz Filut @ Plucky Rebels
JAK ZBUDOWAĆ
METRYKI, KTÓRE
BĘDĄ PODSTAWĄ
UŻYTECZNEGO
SYSTEMU
MONITORINGU

Jaki jest cel ?
Wymiarowanie ?
Diagnostyka ?
Wykrywanie awarii ?
Jakie jest pytanie ?
Jakie jest obciążenie …?

Rozwiązania …
 ~~~2 x Liczba core (w tym HT)
 Konieczny kontekst!
Jakie jest obciążenie CPU ?
 Wykorzystanie procesora per CPU
 Kolejka procesora
 opóźnienie (latency) na kolejce CPU
Jakie jest obciążenie IO?
 iostat
 IO latency

Problem -
Niewyjaśnione przerwy w
replikacji
Kontekst:
 Duży bank w USA,
 PostgreSQL i Slony (replikacja East->West),
 Dostęp do maszyny przez technika (?!?!),
 Dostępny tylko podstawowy monitoring.

Przerwa w replikacji
 Czas trwania przerwy to ok 4
godziny
 W praktyce brak innych metryk (?!)
 Sieć wskazana jako podejrzana
 Rozwiązanie potrzebne ASAP

Jaki jest cel ?
Diagnostyka awarii
Jakie postawić pytania
Jaki jest stan klientów
bazy (w tym replikacji) ?
Czy była przerwa w sieci ?
Jak wyglądają połączenia
TCP_IP

Metryki
 TCP Ping pomiędzy lokalizacjami
 Stan połączeń zrzucony netstatem
 Wyliczenie dokładnego czasu
przerwy na podstawie logów

Problem -
Zatrzymanie platformy klienta
Kontekst:
 150+ JVM’s,
 6 instancji Oracle,
 Internal cloud,
 Brak automatyzacji start-stop.

Hipotezy
 Awaria aplikacji,
 Awaria messagingu,
 Awaria bazy danych,
 Awaria sieci.

Jaki jest cel ?
Diagnostyka awarii
Jakie postawić pytania
Który komponent nie odpowiada ?
Jak wyglądają
połączenia TCP_IP na
węzłach

Rozwiązania …
Dekompozycja problemu
Aktywny monitoring
komponentów
Netstat & Netcat
podczas awarii
There is no silver bullet

Cel: Czytelny dahsboard
Środek: Dobrze dobrane
metryki

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I have high load - so what (in polish) ?

1. A: - MAM WYSOKI LOAD Łukasz Filut @ Plucky Rebels JAK ZBUDOWAĆ METRYKI, KTÓRE BĘDĄ PODSTAWĄ UŻYTECZNEGO SYSTEMU MONITORINGU

2. Chwila o mnie Agile Technology Governance  Strategia IT  Projekty transformacyjne  IT&Project Governance  Audyty  Architektura lukasz@pluckyrebels.com

3. CASE ONE

5. Jak to jest liczone

6. Jak to jest liczone

7. Jak to jest liczone

8. Jak to jest liczone !!!!!!!!!!!!!!!!!!

9. Jak to jest liczone !!!!!!!!!!!!!!!!!!

10. Jaki jest cel ? Wymiarowanie ? Diagnostyka ? Wykrywanie awarii ? Jakie jest pytanie ? Jakie jest obciążenie …?

11. Rozwiązania …  ~~~2 x Liczba core (w tym HT)  Konieczny kontekst! Jakie jest obciążenie CPU ?  Wykorzystanie procesora per CPU  Kolejka procesora  opóźnienie (latency) na kolejce CPU Jakie jest obciążenie IO?  iostat  IO latency

12.

13. Problem - Niewyjaśnione przerwy w replikacji Kontekst:  Duży bank w USA,  PostgreSQL i Slony (replikacja East->West),  Dostęp do maszyny przez technika (?!?!),  Dostępny tylko podstawowy monitoring.

14. Przerwa w replikacji

15. Przerwa w replikacji  Czas trwania przerwy to ok 4 godziny  W praktyce brak innych metryk (?!)  Sieć wskazana jako podejrzana  Rozwiązanie potrzebne ASAP

16. Jaki jest cel ? Diagnostyka awarii Jakie postawić pytania Jaki jest stan klientów bazy (w tym replikacji) ? Czy była przerwa w sieci ? Jak wyglądają połączenia TCP_IP

17. Metryki  TCP Ping pomiędzy lokalizacjami  Stan połączeń zrzucony netstatem  Wyliczenie dokładnego czasu przerwy na podstawie logów

18. CASE THREE

19. Problem - Zatrzymanie platformy klienta Kontekst:  150+ JVM’s,  6 instancji Oracle,  Internal cloud,  Brak automatyzacji start-stop.

20. Hipotezy  Awaria aplikacji,  Awaria messagingu,  Awaria bazy danych,  Awaria sieci.

21. Hipotezy  Awaria aplikacji,  Awaria messagingu,  Awaria bazy danych,  Awaria sieci.

22.

23. Jaki jest cel ? Diagnostyka awarii Jakie postawić pytania Który komponent nie odpowiada ? Jak wyglądają połączenia TCP_IP na węzłach

24. Rozwiązania … Dekompozycja problemu Aktywny monitoring komponentów Netstat & Netcat podczas awarii There is no silver bullet

25. Cel: Czytelny dahsboard Środek: Dobrze dobrane metryki

26. Łukasz Filut lukasz@pluckyrebels.com

Editor's Notes

On Linux, load averages are (or try to be) "system load averages", for the system as a whole, measuring the number of threads that are working and waiting to work (CPU, disk, uninterruptible locks). Put differently, it measures the number of threads that aren't completely idle. Advantage: includes demand for different resources.
On Linux, load averages are (or try to be) "system load averages", for the system as a whole, measuring the number of threads that are working and waiting to work (CPU, disk, uninterruptible locks). Put differently, it measures the number of threads that aren't completely idle. Advantage: includes demand for different resources.
On Linux, load averages are (or try to be) "system load averages", for the system as a whole, measuring the number of threads that are working and waiting to work (CPU, disk, uninterruptible locks). Put differently, it measures the number of threads that aren't completely idle. Advantage: includes demand for different resources.
On Linux, load averages are (or try to be) "system load averages", for the system as a whole, measuring the number of threads that are working and waiting to work (CPU, disk, uninterruptible locks). Put differently, it measures the number of threads that aren't completely idle. Advantage: includes demand for different resources.
On Linux, load averages are (or try to be) "system load averages", for the system as a whole, measuring the number of threads that are working and waiting to work (CPU, disk, uninterruptible locks). Put differently, it measures the number of threads that aren't completely idle. Advantage: includes demand for different resources.
Goal – jaki mamy cel? Question – jakie pytanie mamy do rozwiązania Metric – jakie metryki ono rozwiązuje

I have high load - so what (in polish) ?

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I have high load - so what (in polish) ?

Editor's Notes