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PLSQL... Script: Errori

Shell scripting... Script: Cercare e visualizzare file per dimensione

A User Agent, like a web browser, uses HTTP to request a HTML document



In programming the danger of exploring the small details of coding is that you get obsessed with every line of code you write, thereby greatly reducing productivity.
In general, is not worth obsessing over code.
On the other hand you should code with deliberation and intent. Steven Feurstein Oracle Magazine July /August 2004

A User Agent, like a web browser, uses HTTP to request a HTML document

PostgreSQL

Home >PostgreSQL > Postgres check database is Master or Replica

Stampa  Stampa


Ways to check if you are connected to a master or replica.

Use pg_is_in_recovery(); it returns true if replica.

On Master:
products=# SELECT pg_is_in_recovery(); pg_is_in_recovery ------------------- f (1 row)
On Replica:
products=# SELECT pg_is_in_recovery(); pg_is_in_recovery ------------------- t (1 row)
You can also query the Master view pg_stat_replication providing information and replica mode of connected slaves (potential,sync). On Master:
products=# select application_name, client_addr, sync_state from pg_stat_replication; application_name | client_addr | sync_state ------------------+----------------+------------ products3 | 172.22.100.127 | potential products2 | 172.22.100.120 | sync (3 rows)




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Tutorial
PostgreSQL determine database uptime   [PostgreSQL] 
Postgres check database is Master or Replica ways to check database replication role  [PostgreSQL] 
Ordering by highest or lowest value of multiple columns PostgreSQL functions in order by clause  [PostgreSQL] 
Posgresql how disable and renable foreign constraints forcing data into a table ignoring foreign keys (or trigger)  [PostgreSQL] 
Comandi
date and timestamp simple Using date and timestamp   [PostgreSQL] 
Add time to a date date function operation  [PostgreSQL] 
How set a default schema working away in your postgreSQL session  [PostgreSQL] 
postgres tip: how re-execute a query every n second a nice postgres shell command  [PostgreSQL] 
Grouping data by the week example date_trunc function, trimming days by the week  [PostgreSQL] 
How get PosgreSQL table size pg_total_relation_size function  [PostgreSQL] 
PostgreSQL determine database size pg_database_size function returns database size   [PostgreSQL] 
PostgreSQL enable autostart at reboot on Centos / Redhat Configure autostart after reboot  [PostgreSQL] 

signal Marco Magnani marcomagnani@fishscript.com



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Anger is creative, depression is useless.
Dyson, Freeman J.


Anger is creative, depression is useless.
Dyson, Freeman J.




Oracle... Definizioni: Scalar Subquery





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Nicoleta e Marco Magnani tutorial, examples, courses, esempi, corsi, esercizi, appunti vari Dottoressa Nicoleta Dragu Formatrice Docente Insegnante Mediatrice Culturale Dott. Marco Magnani Universita La Sapienza Roma Master Computer Science Hunter College New York , Data Base Administrator DBA oracle System architect

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