Re: Giant TOAST tables due to many almost empty pages - Mailing list pgsql-bugs
From | Rumko |
---|---|
Subject | Re: Giant TOAST tables due to many almost empty pages |
Date | |
Msg-id | 201005142208.44788.rumcic@gmail.com Whole thread Raw |
In response to | Re: Giant TOAST tables due to many almost empty pages (Tom Lane <tgl@sss.pgh.pa.us>) |
List | pgsql-bugs |
On Friday 14. of May 2010 20:02:02 Tom Lane wrote: > Rumko <rumcic@gmail.com> writes: > > On Friday 14. of May 2010 19:29:44 Tom Lane wrote: > >> Hmm, do both of the toast tables with bloat problems have > >> "{autovacuum_enabled=3Dfalse}" ? > > > > Yeah, but also many others that don't have the problem. > > Hmm, well I can reproduce the problem after doing > alter table foo set (toast.autovacuum_enabled =3D false); > > Haven't investigated exactly why yet, but I imagine that the presence of > a nonnull reloptions setting for a toast table is confusing the code > that determines the default fillfactor. > > As a workaround, I'd suggest getting rid of that: > alter table foo reset (toast.autovacuum_enabled); > and then doing VACUUM FULL on the bloated table. > > regards, tom lane It works! Thank you! # SELECT pg_size_pretty(pg_total_relation_size('low_level."counters_xxx"'))= ;=20 VACUUM FULL VERBOSE low_level."counters_xxx"; SELECT=20 pg_size_pretty(pg_total_relation_size('low_level."counters_xxx"')); pg_size_pretty=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20 ----------------=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20 27 GB=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 (1 row)=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 Time: 393,410 ms INFO: vacuuming "low_level.counters_xxx" INFO: "counters_xxx": found 0 removable, 236783 nonremovable row versions = in=20 236783 pages DETAIL: 0 dead row versions cannot be removed yet.=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20 Nonremovable row versions range from 4288 to 4376 bytes long.=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20 There were 0 unused item pointers.=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20 Total free space (including removable row versions) is 913296036 bytes.=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20 0 pages are or will become empty, including 0 at the end of the table.=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20 236783 pages containing 913296036 free bytes are potential move destination= s.=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20 CPU 2.37s/0.69u sec elapsed 79.70 sec.=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20 INFO: index "low_level.counters_xxx_unique" now contains 236783 row versio= ns=20 in 1177 pages DETAIL: 0 index pages have been deleted, 0 are currently reusable.=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20 CPU 0.01s/0.00u sec elapsed 0.38 sec.=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20=20= =20=20=20=20=20 INFO: index "low_level.counters_xxx_sddidx" now contains 236783 row versio= ns=20 in 915 pages DETAIL: 0 index pages have been deleted, 0 are currently reusable. CPU 0.00s/0.00u sec elapsed 0.33 sec. INFO: index "low_level.counters_xxx_noidx" now contains 236783 row version= s=20 in 915 pages DETAIL: 0 index pages have been deleted, 0 are currently reusable. CPU 0.00s/0.00u sec elapsed 0.30 sec. INFO: "counters_xxx": moved 0 row versions, truncated 236783 to 236783 pag= es DETAIL: CPU 0.00s/0.00u sec elapsed 0.00 sec. INFO: vacuuming "pg_toast.pg_toast_1066371" INFO: "pg_toast_1066371": found 0 removable, 3259181 nonremovable row=20 versions in 3259181 pages DETAIL: 0 dead row versions cannot be removed yet. Nonremovable row versions range from 57 to 122 bytes long. There were 0 unused item pointers. Total free space (including removable row versions) is 26386339332 bytes. 0 pages are or will become empty, including 0 at the end of the table. 3259181 pages containing 26386339332 free bytes are potential move=20 destinations. CPU 33.17s/10.71u sec elapsed 492.24 sec. INFO: index "pg_toast_1066371_index" now contains 3259181 row versions in= =20 8938 pages DETAIL: 0 index pages have been deleted, 0 are currently reusable. CPU 0.11s/0.03u sec elapsed 7.61 sec. INFO: "pg_toast_1066371": moved 3230346 row versions, truncated 3259181 to= =20 28835 pages DETAIL: CPU 191.61s/95.90u sec elapsed 4789.52 sec. INFO: index "pg_toast_1066371_index" now contains 3259181 row versions in= =20 17798 pages DETAIL: 3230346 index row versions were removed. 0 index pages have been deleted, 0 are currently reusable. CPU 0.59s/2.81u sec elapsed 12.00 sec. VACUUM Time: 5383853,256 ms pg_size_pretty ---------------- 2238 MB (1 row) Time: 78,891 ms --=20 Regards, Rumko
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