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| author | Fujii Masao <fujii@postgresql.org> | 2020-05-22 23:33:58 +0900 |
|---|---|---|
| committer | Fujii Masao <fujii@postgresql.org> | 2020-05-22 23:33:58 +0900 |
| commit | eaae947e2b99a84c8f321fe084d87daff0f77d02 (patch) | |
| tree | 5a921e0c4c25f04ed9d89d3c2d7a51d11ee80f74 /src/backend/access/gist | |
| parent | 574925bfd0a8175f6e161936ea11d9695677ba09 (diff) | |
| download | postgresql-eaae947e2b99a84c8f321fe084d87daff0f77d02.tar.gz postgresql-eaae947e2b99a84c8f321fe084d87daff0f77d02.zip | |
doc: Add note about I/O timing information in EXPLAIN and pg_stat_database.
Explain that the followings are tracked only when track_io_timing GUC
is enabled.
- blk_read_time and blk_write_time in pg_stat_database
- time spent reading and writing data file blocks in EXPLAIN output
with BUFFERS option
Whther track_io_timing is enabled affects also blk_read_time and
blk_write_time in pg_stat_statements, but which was already documented.
Author: Atsushi Torikoshi
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/CACZ0uYHo_NwbxpLH76OGF-O=13tkR0ZM0zeyGEhZ+JEXZVRyCA@mail.gmail.com
Diffstat (limited to 'src/backend/access/gist')
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