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  • Connexions aux db du cloud

    #!/bin/sh
    #-------------------------------------------------------------------------------
    #
    # Script to connect to IBM Cloud DB, version 2.0
    # Author : JJY
    #
    #-------------------------------------------------------------------------------
    #set -vx
    ##############
    #INSTANCIATION
    ##############
    DOMAIN="<domain>"
    DATABASE="postgres"
    USERNAME="<user_dba>"

    while true
    do
    DATABASE="postgres"
     clear
     echo "CONNEXION AUX BASES DU CLOUD "
     echo " "
     echo "CONNEXION A l ECOSYSTEM : <ecosystem>"
     echo " "
     echo "1 - DEV(dbname) - serveur : <instance> connexion DBA"
     echo " "
     echo "2 - DEV(dbname) - serveur : <instance> connexion dynamique applicative"
     echo " "
     echo "3 - QUAL(dbname) - serveur : <instance> connexion DBA"
     echo " "
     echo "4 - QUAL(dbname) - serveur : <instance> connexion dynamique applicative"
     echo " "
     echo "0 - TOOLBOX VAULT "
     echo " "
     echo " Faites votre choix (0 a 4) :"
     echo " Taper Q pour quitter."
     echo " "
     read var
     case $var in
            1)
            echo "Connexion a la base, veuillez patienter..."
            export ECOSYSTEM=<ecosystem>;export SERVER=<instance>;export PORT=<port>;
            vault read -ns="$VAULT_NAMESPACE/$ECOSYSTEM" database/postgres/$SERVER/static-creds/$USERNAME
            secret=$(vault read -ns="$VAULT_NAMESPACE/$ECOSYSTEM"  database/postgres/$SERVER/static-creds/$USERNAME | grep password |  awk '{print $2}')
            export PGPASSWORD=$secret;psql -h $SERVER$DOMAIN -p $PORT -U $USERNAME -d $DATABASE
            ;;
            2)
            export ECOSYSTEM=<ecosystem>;export SERVER=<instance>;export PORT=<port>;export DATABASE=<dbname>
            echo "Liste des roles:"
            vault list -ns=$VAULT_NAMESPACE/$ECOSYSTEM database/postgres/$SERVER/roles
            echo " "
            echo "A quel role souhaitez-vous vous connecter:"
            read ROLE
            clear
            echo "Connexion a la base en mode dynamique, veuillez patienter..."
            var=$(vault read -ns=$VAULT_NAMESPACE/$ECOSYSTEM database/postgres/$SERVER/creds/$ROLE)
            username=$(echo "$var" | grep username |  awk '{print $2}');
            password=$(echo "$var" | grep password |  awk '{print $2}');
            echo "User is : $username"
            echo "Password is : $password"
            echo " Tapez entrée pour continuer."
            read bidon
            export PGPASSWORD=$password;psql -h $SERVER$DOMAIN -p $PORT -U $username -d $DATABASE
            ;;
            3)
            echo "Connexion a la base, veuillez patienter..."
            export ECOSYSTEM=<ecosystem>;export SERVER=<instance>;export PORT=<port>;
            vault read -ns="$VAULT_NAMESPACE/$ECOSYSTEM" database/postgres/$SERVER/static-creds/$USERNAME
            secret=$(vault read -ns="$VAULT_NAMESPACE/$ECOSYSTEM"  database/postgres/$SERVER/static-creds/$USERNAME | grep password |  awk '{print $2}')
            export PGPASSWORD=$secret;psql -h $SERVER$DOMAIN -p $PORT -U $USERNAME -d $DATABASE
            ;;
            4)
            export ECOSYSTEM=<ecosystem>;export SERVER=<instance>;export PORT=<port>;export DATABASE=<dbname>
            echo "Liste des roles:"
            vault list -ns=$VAULT_NAMESPACE/$ECOSYSTEM database/postgres/$SERVER/roles
            echo " "
            echo "A quel role souhaitez-vous vous connecter:"
            read ROLE
            clear
            echo "Connexion a la base en mode dynamique, veuillez patienter..."
            var=$(vault read -ns=$VAULT_NAMESPACE/$ECOSYSTEM database/postgres/$SERVER/creds/$ROLE)
            username=$(echo "$var" | grep username |  awk '{print $2}');
            password=$(echo "$var" | grep password |  awk '{print $2}');
            echo "User is : $username"
            echo "Password is : $password"
            echo " Tapez entrée pour continuer."
            read bidon
            export PGPASSWORD=$password;psql -h $SERVER$DOMAIN -p $PORT -U $username -d $DATABASE
            ;;
            0)
            ./toolbox.sh
            echo " Tapez entrée pour continuer."
            read bidon
            ;;
            Q)
            echo "Merci d'avoir utiliser ce programme."
            exit
            ;;
            *)
            echo "Merci de renseignez un chiffre entre 0 et 4."
            echo " Tapez entrée pour continuer."
            read bidon
            ;;
     esac
    done
    exit

  • [Postgres] Spot a missing postgreSQL index

    --tuto tuning psql
    --Spot a missing PostgreSQL index

    SELECT
      relname                                               AS TableName,
      to_char(seq_scan, '999,999,999,999')                  AS TotalSeqScan,
      to_char(idx_scan, '999,999,999,999')                  AS TotalIndexScan,
      to_char(n_live_tup, '999,999,999,999')                AS TableRows,
      pg_size_pretty(pg_relation_size(relname :: regclass)) AS TableSize
    FROM pg_stat_all_tables
    WHERE schemaname = 'public'
          AND 50 * seq_scan > idx_scan -- more than 2%
          AND n_live_tup > 10000
          AND pg_relation_size(relname :: regclass) > 5000000
    ORDER BY relname ASC;

    --To find unused index in a db

    SELECT
      relname AS table,
      indexrelname AS index,
      pg_size_pretty(pg_relation_size(i.indexrelid)) AS index_size,
      idx_scan as index_scans
    FROM pg_stat_user_indexes ui
    JOIN pg_index i ON ui.indexrelid = i.indexrelid
    WHERE NOT indisunique AND idx_scan =0 AND pg_relation_size(relid) > 5 * 8192
    ORDER BY pg_relation_size(i.indexrelid) / nullif(idx_scan, 0) DESC NULLS FIRST,
    pg_relation_size(i.indexrelid) DESC;


    --returns the tables which have been hit by sequential scans the most and tells us how many rows a sequential scan has hit on average.
    SELECT schemaname, 
                  relname, 
                  seq_scan, 
                  seq_tup_read, 
                  idx_scan, 
                  seq_tup_read / seq_scan AS avg
     FROM         pg_stat_user_tables 
     WHERE        seq_scan > 0 
     ORDER BY     seq_tup_read DESC;
    --Finding slow queries to be executed on pgadmin
    SELECT query, 
                  total_exec_time, 
                  calls, 
                  mean_exec_time 
           FROM   pg_stat_statements 
           ORDER BY total_exec_time DESC;