postgresqm-connection-tester
This is a quick hack to abuse a postgresql database. It will connect to the URI
specified in the envar DATABASE_URL (eg: postgresql://127.0.0.1/template1) and issue a pile of queries. The template1database,or any database with a table calledpg_typewith atypname string` column, will work. No writes are
made.
The envar CONCURRENT_CONNECTIONS specifies the number of concurrent database
connections to attempt. There is no syncronization, so it's possible some will
finish prior to others completing. In my test, 100 (with a limit of 100 in the
server) properly works. 101 fails with an error. 500 fails with a different
error, perhaps related to the OS limiting TCP connection rate.
Example
CONCURRENT_CONNECTIONS=101 DATABASE_URL="postgresql://127.0.0.1/template1" go run main.go