Sachi's bloat table maintenance script in Greenplum database

Post date: Oct 16, 2014 11:37:48 PM

Script name: projectdb_bloat_maint_weekly.sh

Features: a) Fully Customizable b) Read database from a parameter files. can also be generated dynamically c) Displays time to fix single table bloat, all table bloat of a db and all table bloats for all db in the projectdb. d) creates script output log for future reference

Parameter files:

a) projectdb: parameter files to read list of user database in the maintenance script (list can be generated dynamically).

[gpadmin@sachi myscripts]$ cat projectdb

sachi

b) bloattablelist.sql: SQL to generate list of bloat tables in projectdb. List is generated dynamically and customizable.

c)dir_param: Scripts and log file locations

[gpadmin@sachi myscripts]$ cat dir_param

#########################################################################################################

## Script name: dir_param

## Decription: Script to define directory structure used in Greenplum database maintenance scripts

#######################################################################################################

export SCRIPTS_DIR=/home/gpadmin/maintenance/myscripts

export SCRIPTS_LOG=/home/gpadmin/maintenance/myscripts_log

########################################################################################################

c) Running the script

nohup $SCRIPTS_DIR/projectdb_bloat_maint_weekly.sh > $SCRIPTS_LOG/projectdb_bloat_maint_weekly_ouput_$(date +\%Y\%m\%d_\%H:\%M).log 2>&1 &

Script output

Before bloat maintenance

--------+-------+------------+--------------+-------------+---------------+---------------+--------------+---------------+-------------

sachi | 83678 | public | bloattest | 19.6 | 67 MB | 1312 MB | 1245 MB | 0.9967 | 18.52354263

##############################################################################################

Fix Bloat by REORGANIZE and ANALYZE bloat tables in Greenplum user database

##############################################################################################

ALTER TABLE public.bloattest SET WITH (REORGANIZE=TRUE);

ALTER TABLE

ANALYZE public.bloattest;

ANALYZE

TIME_ELAPSED to finish public.bloattest maintenance of sachi, 00:00:10

TIME_ELAPSED to finish sachi maintenance , 00:00:10

After bloat maintenance

--------+-------+------------+--------------+-------------+---------------+---------------+--------------+---------------+------------

TIME_ELAPSED to finish projectdb_bloat_maint_weekly maintenance , 00:00:10

[gpadmin@sachi myscripts]$

Email us at gpdba@greenplumdba.com to get this script or buy our premium email support.