How can I check available space of an index's pages in PostgreSQL?
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For tables, I can simply use pg_freespace to check available spaces like below:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+------------------------
1978140 | 1.00397105361602313000
But for indexes, it does not work.
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
---------+----------------------------
1224867 | 0.000000000000000000000000
Additionally, this is the result of same queries after VACUUM FULL:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+----------------------------
1833413 | 0.000000000000000000000000
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
--------+----------------------------
836994 | 0.000000000000000000000000
postgresql-10 vacuum
asked 4 mins ago
Bill GreensBill Greens
183
add a comment |
0
For tables, I can simply use pg_freespace to check available spaces like below:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+------------------------
1978140 | 1.00397105361602313000
But for indexes, it does not work.
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
---------+----------------------------
1224867 | 0.000000000000000000000000
Additionally, this is the result of same queries after VACUUM FULL:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+----------------------------
1833413 | 0.000000000000000000000000
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
--------+----------------------------
836994 | 0.000000000000000000000000
postgresql-10 vacuum
asked 4 mins ago
Bill GreensBill Greens
183
add a comment |
0
0
0
For tables, I can simply use pg_freespace to check available spaces like below:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+------------------------
1978140 | 1.00397105361602313000
But for indexes, it does not work.
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
---------+----------------------------
1224867 | 0.000000000000000000000000
Additionally, this is the result of same queries after VACUUM FULL:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+----------------------------
1833413 | 0.000000000000000000000000
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
--------+----------------------------
836994 | 0.000000000000000000000000
postgresql-10 vacuum
asked 4 mins ago
Bill GreensBill Greens
183
For tables, I can simply use pg_freespace to check available spaces like below:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+------------------------
1978140 | 1.00397105361602313000
But for indexes, it does not work.
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
---------+----------------------------
1224867 | 0.000000000000000000000000
Additionally, this is the result of same queries after VACUUM FULL:
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename');
count | ?column?
---------+----------------------------
1833413 | 0.000000000000000000000000
postgres=> SELECT count(*),avg(1000*avail/8192)/10 FROM pg_freespace('tablename_pkey');
count | ?column?
--------+----------------------------
836994 | 0.000000000000000000000000
postgresql-10 vacuum
postgresql-10 vacuum
asked 4 mins ago
Bill GreensBill Greens
183
asked 4 mins ago
Bill GreensBill Greens
183
asked 4 mins ago
Bill GreensBill Greens
183
asked 4 mins ago
Bill GreensBill Greens
183
asked 4 mins ago
Bill GreensBill Greens
183
183
add a comment |
add a comment |
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