corlaez

Hexagonal Architecture

Conceptualized by Alistair Cockburn. Also known as "Ports and Adapters".

In a nutshell:

Application Driver -> Primary Adapter -> Primary Port -> Use Case -> Secondary Port -> Secondary Adapter -> External System/Side Effect

geozelot

DROP AGGREGATE IF EXISTS public.ST_AsFeatureCollection(ANYELEMENT);
DROP AGGREGATE IF EXISTS public.ST_AsFeatureCollection(ANYELEMENT, TEXT);
DROP AGGREGATE IF EXISTS public.ST_AsFeatureCollection(ANYELEMENT, INT);
DROP AGGREGATE IF EXISTS public.ST_AsFeatureCollection(ANYELEMENT, TEXT, INT);
DROP AGGREGATE IF EXISTS public.ST_AsFeatureCollection(ANYELEMENT, INT, TEXT);
DROP FUNCTION IF EXISTS public._st_asfeaturecollection_transfn(collection TEXT[], item ANYELEMENT);
DROP FUNCTION IF EXISTS public._st_asfeaturecollection_transfn(collection TEXT[], item ANYELEMENT, TEXT);
DROP FUNCTION IF EXISTS public._st_asfeaturecollection_transfn(collection TEXT[], item ANYELEMENT, INT);
DROP FUNCTION IF EXISTS public._st_asfeaturecollection_transfn(collection TEXT[], item ANYELEMENT, TEXT, INT);
DROP FUNCTION IF EXISTS public._st_asfeaturecollection_transfn(collection TEXT[], item ANYELEMENT, INT, TEXT);

shanselman

{
    "$schema": "https://aka.ms/terminal-profiles-schema",
    "copyOnSelect": false,
    "defaultProfile": "{574e775e-4f2a-5b96-ac1e-a2962a402336}",
    // Add custom keybindings to this array.
    // To unbind a key combination from your defaults.json, set the command to "unbound".
    // To learn more about keybindings, visit https://aka.ms/terminal-keybindings
    "keybindings": 
    [
        // Copy and paste are bound to Ctrl+Shift+C and Ctrl+Shift+V in your defaults.json.

nerzhulart

$userPath = $env:USERPROFILE
$pathExclusions = New-Object System.Collections.ArrayList
$processExclusions = New-Object System.Collections.ArrayList

$pathExclusions.Add('C:\Windows\Microsoft.NET') > $null
$pathExclusions.Add('C:\Windows\assembly') > $null
$pathExclusions.Add($userPath + '\AppData\Local\Microsoft\VisualStudio') > $null
$pathExclusions.Add('C:\ProgramData\Microsoft\VisualStudio\Packages') > $null
$pathExclusions.Add('C:\Program Files (x86)\MSBuild') > $null
$pathExclusions.Add('C:\Program Files (x86)\Microsoft Visual Studio 14.0') > $null

jpolchlo

anvk

--- PSQL queries which also duplicated from https://github.com/anvk/AwesomePSQLList/blob/master/README.md
--- some of them taken from https://www.slideshare.net/alexeylesovsky/deep-dive-into-postgresql-statistics-54594192

-- I'm not an expert in PSQL. Just a developer who is trying to accumulate useful stat queries which could potentially explain problems in your Postgres DB.

------------
-- Basics --
------------

-- Get indexes of tables

cyhsutw

herval

Make a backup from RDS

pg_dump -h <rds host> -p 5432 -F c -O -U <rds user> <db name> > db.dump

Restore the backup into a Docker container

docker run --rm --interactive --link <postgres container id>:postgres --volume $PWD/:/tmp/ postgres:latest /bin/bash -c 'pg_restore --verbose --clean --no-acl --no-owner -h "$POSTGRES_PORT_5432_TCP_ADDR" -p "$POSTGRES_PORT_5432_TCP_PORT" -U postgres -d <db name> /tmp/db.dump'

ruckus

** Find commmonly accessed tables and their use of indexes:

SELECT relname,seq_tup_read,idx_tup_fetch,cast(idx_tup_fetch AS numeric) / (idx_tup_fetch + seq_tup_read) AS idx_tup_pct FROM pg_stat_user_tables WHERE (idx_tup_fetch + seq_tup_read)>0 ORDER BY idx_tup_pct;

Returns output like:

       relname        | seq_tup_read | idx_tup_fetch |      idx_tup_pct       
----------------------+--------------+---------------+------------------------
 schema_migrations    |          817 |             0 | 0.00000000000000000000
 user_device_photos   |          349 |             0 | 0.00000000000000000000

troyk

1) see re: increasing shmmax http://stackoverflow.com/a/10629164/1283020

2) add to postgresql.conf:
shared_preload_libraries = 'pg_stat_statements'   # (change requires restart)
136 pg_stat_statements.max = 1000
137 pg_stat_statements.track = all

3) restart postgres

4) check it out in psql