Postgresql - Optimizing creation of several indexes on one big table
What's the best way to create multiple indexes on one very large table (hundreds of Gb).
Currently I have to execute queries like that
create index A on myBigTable (a) using btree ;
create index B on myBigTable (b) using btree ;
create index C on myBigTable (c) using btree ;
....
It takes a very long time. PG has to read all the data from the table several times.
When index on column A is in creation, it prevents from creating an index on column B at the same time.
So, is there a way to optimize the time (and resources consumption) to create all indexes on the same table?
If not possible to really optimize currently, is it something planned for a near future?
postgresql optimization indexing
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
asked Nov 15 '18 at 14:59
EnialisEnialis
787
add a comment |
What's the best way to create multiple indexes on one very large table (hundreds of Gb).
Currently I have to execute queries like that
create index A on myBigTable (a) using btree ;
create index B on myBigTable (b) using btree ;
create index C on myBigTable (c) using btree ;
....
It takes a very long time. PG has to read all the data from the table several times.
When index on column A is in creation, it prevents from creating an index on column B at the same time.
So, is there a way to optimize the time (and resources consumption) to create all indexes on the same table?
If not possible to really optimize currently, is it something planned for a near future?
postgresql optimization indexing
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
asked Nov 15 '18 at 14:59
EnialisEnialis
787
2
create index concurrently ...will allow you to create all indexes at the same time (if issued from different connections)
– a_horse_with_no_name
Nov 15 '18 at 15:07
1
Postgres 11 improved the time it takes to create the index as it can use a parallel scan on the table
– a_horse_with_no_name
Nov 15 '18 at 15:09
thank you @a_horse_with_no_name , but are you sure ? with different connexion, when creating index with 'concurrently', I see that one index is being creating, and others are 'waiting' (wait_evt_typ = lock // wait_evt = relation)
– Enialis
Jan 16 at 11:51
add a comment |
What's the best way to create multiple indexes on one very large table (hundreds of Gb).
Currently I have to execute queries like that
create index A on myBigTable (a) using btree ;
create index B on myBigTable (b) using btree ;
create index C on myBigTable (c) using btree ;
....
It takes a very long time. PG has to read all the data from the table several times.
When index on column A is in creation, it prevents from creating an index on column B at the same time.
So, is there a way to optimize the time (and resources consumption) to create all indexes on the same table?
If not possible to really optimize currently, is it something planned for a near future?
postgresql optimization indexing
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
asked Nov 15 '18 at 14:59
EnialisEnialis
787
What's the best way to create multiple indexes on one very large table (hundreds of Gb).
Currently I have to execute queries like that
create index A on myBigTable (a) using btree ;
create index B on myBigTable (b) using btree ;
create index C on myBigTable (c) using btree ;
....
It takes a very long time. PG has to read all the data from the table several times.
When index on column A is in creation, it prevents from creating an index on column B at the same time.
So, is there a way to optimize the time (and resources consumption) to create all indexes on the same table?
If not possible to really optimize currently, is it something planned for a near future?
postgresql optimization indexing
postgresql optimization indexing
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
asked Nov 15 '18 at 14:59
EnialisEnialis
787
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
asked Nov 15 '18 at 14:59
EnialisEnialis
787
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
edited Nov 15 '18 at 15:08
a_horse_with_no_name
302k46463559
302k46463559
asked Nov 15 '18 at 14:59
EnialisEnialis
787
asked Nov 15 '18 at 14:59
EnialisEnialis
787
asked Nov 15 '18 at 14:59
EnialisEnialis
787
787
2
create index concurrently ...will allow you to create all indexes at the same time (if issued from different connections)
– a_horse_with_no_name
Nov 15 '18 at 15:07
1
Postgres 11 improved the time it takes to create the index as it can use a parallel scan on the table
– a_horse_with_no_name
Nov 15 '18 at 15:09
thank you @a_horse_with_no_name , but are you sure ? with different connexion, when creating index with 'concurrently', I see that one index is being creating, and others are 'waiting' (wait_evt_typ = lock // wait_evt = relation)
– Enialis
Jan 16 at 11:51
add a comment |
2
create index concurrently ...will allow you to create all indexes at the same time (if issued from different connections)
– a_horse_with_no_name
Nov 15 '18 at 15:07
1
Postgres 11 improved the time it takes to create the index as it can use a parallel scan on the table
– a_horse_with_no_name
Nov 15 '18 at 15:09
thank you @a_horse_with_no_name , but are you sure ? with different connexion, when creating index with 'concurrently', I see that one index is being creating, and others are 'waiting' (wait_evt_typ = lock // wait_evt = relation)
– Enialis
Jan 16 at 11:51
2
2
create index concurrently ... will allow you to create all indexes at the same time (if issued from different connections)– a_horse_with_no_name
Nov 15 '18 at 15:07
create index concurrently ... will allow you to create all indexes at the same time (if issued from different connections)– a_horse_with_no_name
Nov 15 '18 at 15:07
1
1
Postgres 11 improved the time it takes to create the index as it can use a parallel scan on the table
– a_horse_with_no_name
Nov 15 '18 at 15:09
Postgres 11 improved the time it takes to create the index as it can use a parallel scan on the table
– a_horse_with_no_name
Nov 15 '18 at 15:09
thank you @a_horse_with_no_name , but are you sure ? with different connexion, when creating index with 'concurrently', I see that one index is being creating, and others are 'waiting' (wait_evt_typ = lock // wait_evt = relation)
– Enialis
Jan 16 at 11:51
thank you @a_horse_with_no_name , but are you sure ? with different connexion, when creating index with 'concurrently', I see that one index is being creating, and others are 'waiting' (wait_evt_typ = lock // wait_evt = relation)
– Enialis
Jan 16 at 11:51
add a comment |
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2
create index concurrently ...will allow you to create all indexes at the same time (if issued from different connections)– a_horse_with_no_name
Nov 15 '18 at 15:07
1
Postgres 11 improved the time it takes to create the index as it can use a parallel scan on the table
– a_horse_with_no_name
Nov 15 '18 at 15:09
thank you @a_horse_with_no_name , but are you sure ? with different connexion, when creating index with 'concurrently', I see that one index is being creating, and others are 'waiting' (wait_evt_typ = lock // wait_evt = relation)
– Enialis
Jan 16 at 11:51