| From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org> |
| Subject: | vacuum timings |
| Date: | 2000-01-21 05:43:49 |
| Message-ID: | 200001210543.AAA13592@candle.pha.pa.us |
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| Lists: | pgsql-hackers |
I loaded 10,000,000 rows into CREATE TABLE test (x INTEGER); Table is
400MB and index is 160MB.
With index on the single in4 column, I got:
78 seconds for a vacuum
121 seconds for vacuum after deleting a single row
662 seconds for vacuum after deleting the entire table
With no index, I got:
43 seconds for a vacuum
43 seconds for vacuum after deleting a single row
43 seconds for vacuum after deleting the entire table
I find this quite interesting.
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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