Re: script to drop and create all indexes in a database with parameter concurrently

Comment:
Why don't you simply use a bash script that:
1. gets list of all indexes in a file with prefix 'DROP INDEX...<index_name'
2. Since now each line is a command, input this file to psql.

I create all of my objects inside "schemas".  As a result that won't quite work because you need to set the search_path
priorto doing the drop and create.  The script works for both those people that just use the public "schema" and those
thatuse many "schema".  By "schema" I am referring to the name space that the database objects are built in.
 

Thanks,

Lance Campbell
Software Architect
Web Services at Public Affairs
217-333-0382 



-----Original Message-----
From: Payal Singh [mailto:payal@omniti.com] 
Sent: Wednesday, December 18, 2013 9:04 AM
To: Doom.zhou
Cc: Campbell, Lance; pgsql-admin@postgresql.org
Subject: Re: [ADMIN] script to drop and create all indexes in a database with parameter concurrently

Why don't you simply use a bash script that:
1. gets list of all indexes in a file with prefix 'DROP INDEX...<index_name'
2. Since now each line is a command, input this file to psql.

On Wed, Dec 18, 2013 at 03:43:01PM +0800, Doom.zhou wrote:
> oh my fault !!it's horrible
> *ERROR:  deadlock detected*
> *DETAIL:  Process 10504 waits for ShareUpdateExclusiveLock on relation
> 23298 of database 16407; blocked by process 10502.*
> *        Process 10502 waits for ShareLock on virtual transaction 2/6981;
> blocked by process 10504.*
> *        Process 10504: CREATE INDEX CONCURRENTLY t_ems_log_opt_time_idx ON
> t_ems_log USING btree (opt_time);*
> *        Process 10502: CREATE INDEX CONCURRENTLY t_ems_log_create_by_idx
> ON t_ems_log USING btree (create_by);*
> *HINT:  See server log for query details.*
> *STATEMENT:  CREATE INDEX CONCURRENTLY t_ems_log_opt_time_idx ON 
> t_ems_log USING btree (opt_time);*
> 
> *parallel feature script *
> 
> 
> >>
> >>
> >>
> >>
> >>
> > *#set variablesexport
> > PATH=$HOME/bin:$PATH#main 
> >
dbhost=192.168.0.214database=haierdbport=5432schema=publicdbschema=~/tbctemp/dbschema.txtfiltered=~/tbctemp/dbschema_filtered.txtsql=~/tbctemp/rebuild_indexes.sql
rm"$dbschema"; rm "$filtered"; rm "$sql" pg_dump -U postgres -s -h "$dbhost"
 
> > -p $dbport -n $schema  "$database" > "$dbschema" grep -e CREATE\ 
> > INDEX -e SET\ search_path "$dbschema" | sed 's/CREATE\ INDEX/CREATE\ 
> > INDEX\ CONCURRENTLY/g' > "$filtered"#parallel tmp_fifofile="/tmp/$.fifo"mkfifo
> > $tmp_fifofile      exec 6<>$tmp_fifofile     rm $tmp_fifofilethread=2for
> > ((i=0;i<$thread;i++));do echodone >&6 # while read pdoread -u6   #if [[
> > "$p" == SET* ]]; then  #  echo $p >> "$sql"  #else  {    name=$(cut -d\
> >  -f4 <<<"${p}")    drop="DROP INDEX $name;"    echo $drop >> "$sql"    echo
> > $p >> "$sql"        psql -U postgres -h "$dbhost" -p $dbport -d "$database"
> > -c "$drop"        psql -U postgres -h "$dbhost" -p $dbport -d "$database"
> > -c "$p"  #fi    echo >&6  } &done < "$filtered"waitexec 6>&-#psql -U
> > postgres -h "$dbhost" -p $dbport -d "$database" -f "$sql" #rm 
> > "$dbschema"#rm "$filtered"#rm "$sql"  #end*
> 
> 
> 
> 
> On Wed, Dec 18, 2013 at 2:19 PM, Doom.zhou <zzepaigh@gmail.com> wrote:
> 
> >
> >
> >
> > On Wed, Dec 18, 2013 at 4:24 AM, Campbell, Lance <lance@illinois.edu>wrote:
> >
> >>  Below is a Linux script I wrote that will drop and create all of 
> >> the indexes for your database with the “concurrently” parameter.
> >>
> >>
> >>
> >> #!/bin/sh
> >>
> >>
> >>
> >> dbhost=localhost
> >>
> >> database=somedatabasename
> >>
> >> dbschema=/tempfile/dbschema.txt
> >>
> >> filtered=/tempfile/dbschema_filtered.txt
> >>
> >> sql=/tempfile/rebuild_indexes.sql
> >>
> >>
> >>
> >> rm "$dbschema"
> >>
> >> rm "$filtered"
> >>
> >> rm "$sql"
> >>
> >>
> >>
> >> pg_dump -s -h "$dbhost" "$database" > "$dbschema"
> >>
> >>
> >>
> >  Great script !
> > i think you can add parallel perform each couple (drop & create 
> > index).  ^^
> >