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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
dbname | relid | schemaname | tablename | bloat_ratio | expected_size | relation_size | wasted_space | relative_size | concern
--------+-------+------------+--------------+-------------+---------------+---------------+--------------+---------------+-------------
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
dbname | relid | schemaname | tablename | bloat_ratio | expected_size | relation_size | wasted_space | relative_size | concern
--------+-------+------------+--------------+-------------+---------------+---------------+--------------+---------------+------------
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.