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Kent Pham hungpk

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hungpk / pgcluu-s3.sh
Last active August 29, 2015 14:07
Collect PostgreSQL stat using pgcluu_collectd and put it to S3
#!/bin/sh
HOST=$1
BASE_DIR=$2
S3BUCKET=<s3-bucket>
NOW=`date +"%Y-%m-%d"`
PREFIX=pgcluu
DATA_DIR=$BASE_DIR/$PREFIX-$NOW
#kill current process
pgcluu_collectd -k -f $BASE_DIR/current/pg_cluu_collectd.pid
@hungpk
hungpk / prod_postgres.md
Last active August 29, 2015 14:07 — forked from selenamarie/prod_postgres.md

Ideal Postgres environment

Documentation

  • Documented replication topology
  • Documented network topology
  • Documented interface topology - including users, passwords, connection estimates, load balancers, connection proxies
  • Documented procedure, schedule for failover and testing
  • Documented procedure, schedule for disaster recovery and testing
@hungpk
hungpk / gist:10959761
Created April 17, 2014 07:08 — forked from ruckus/gist:2293434

WAL-E needs to be installed on all machines, masters and slaves.

How to install WAL-E

Only one machine, the master, writes WAL segments via continuous archiving. The configuration for the master postgresql.conf is:

archive_mode = on
archive_command = 'envdir /etc/wal-e.d/env wal-e wal-push %p'
archive_timeout = 60
@hungpk
hungpk / ocr.markdown
Created March 27, 2014 17:06 — forked from henrik/ocr.markdown

Install ImageMagick for image conversion:

brew install imagemagick

Install tesseract for OCR:

brew install tesseract --all-languages

Or install without --all-languages and install them manually as needed.

@hungpk
hungpk / master_pg_hba.conf
Created March 25, 2014 02:32 — forked from greinacker/master_pg_hba.conf
hostssl replication replicator 5.6.7.8 md5
@hungpk
hungpk / gist:9732900
Created March 24, 2014 01:56 — forked from ruckus/gist:2293434

WAL-E needs to be installed on all machines, masters and slaves.

How to install WAL-E

Only one machine, the master, writes WAL segments via continuous archiving. The configuration for the master postgresql.conf is:

archive_mode = on
archive_command = 'envdir /etc/wal-e.d/env wal-e wal-push %p'
archive_timeout = 60
@hungpk
hungpk / query_planner.markdown
Created February 20, 2014 23:43 — forked from hgmnz/query_planner.markdown

Types of index scans

Indexes

Sequential Scan:

  • Read every row in the table
  • No reading of index. Reading from indexes is also expensive.
@hungpk
hungpk / a_mongodb_to_s3_backup.sh
Created August 29, 2013 10:26 — forked from lazarofl/a_mongodb_to_s3_backup.sh
#!/bin/bash
#Force file syncronization and lock writes
mongo admin --eval "printjson(db.fsyncLock())"
MONGODUMP_PATH="/usr/bin/mongodump"
MONGO_HOST="prod.example.com"
MONGO_PORT="27017"
MONGO_DATABASE="dbname"
@hungpk
hungpk / gist:6110028
Created July 30, 2013 03:40 — forked from german/gist:1237902
# run with: god -c /path/to/config.god [add -D if you want to not-deamonize god]
# This is the actual config file used to keep the delayed_job running
APPLICATION_ROOT = "/var/www/application"
RAILS_ENV = "production"
God.watch do |w|
w.name = "delayed_job_production"
w.interval = 15.seconds
w.start = "/bin/bash -c 'cd #{APPLICATION_ROOT}/current; /usr/bin/env RAILS_ENV=#{RAILS_ENV} #{APPLICATION_ROOT}/current/script/delayed_job start > /tmp/delay_job.out'"
@hungpk
hungpk / bash-autocomplete-script
Created July 9, 2013 04:26 — forked from Holek/bash-autocomplete-script
curl https://raw.github.com/git/git/master/contrib/completion/git-completion.bash -o ~/.git-completion.bash
echo "source ~/.git-completion.bash" >> ~/.bash_profile