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Re: pg_upgrade —link does it remove table bloat

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On 2/13/20 12:45 PM, Jason Ralph wrote:
@Adrian Klaver,
I was concerned with the 1.4 value of tbloat and wastedbytes value, then again the last autovacuum was at 2020-02-13 02:25:22.533372-05 and I took this snapshot at 3:44PMEST.  So it may be ok, what do you think?

What is your concern, storage space or performance of queries?

If performance then an EXPLAIN ANALYZE on a query will help show whether there is an issue or not.



current_database | schemaname |                 tablename                 | tbloat | wastedbytes |                     iname                     | ibloat | wastedibytes
notimportant         | public              | members                                   |    1.4   |  3080314880  | members_cobrid                      |    0.2 |            0





notimportant=# select * from pg_stat_user_tables where relname = 'members';
-[ RECORD 1 ]-------+------------------------------
relid               | 2045245
schemaname          | public
relname             | members
seq_scan            | 55065
seq_tup_read        | 201069350222
idx_scan            | 5349501175
idx_tup_fetch       | 7201402647
n_tup_ins           | 910616
n_tup_upd           | 46730942
n_tup_del           | 1
n_tup_hot_upd       | 41845682
n_live_tup          | 18262438
n_dead_tup          | 14740
n_mod_since_analyze | 2476
last_vacuum         | 2019-10-13 01:01:40.587534-04
last_autovacuum     | 2020-02-13 02:25:22.533372-05
last_analyze        | 2019-10-13 01:01:41.916929-04
last_autoanalyze    | 2020-02-13 13:44:46.273096-05
vacuum_count        | 15
autovacuum_count    | 92
analyze_count       | 15
autoanalyze_count   | 243

Jason Ralph



--
Adrian Klaver
adrian.klaver@xxxxxxxxxxx





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