| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Takahiro Itagaki <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> |
| Cc: | Greg Smith <greg(at)2ndquadrant(dot)com>, Euler Taveira de Oliveira <euler(at)timbira(dot)com>, Jeff Janes <jeff(dot)janes(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: EXPLAIN BUFFERS |
| Date: | 2009-12-10 15:26:27 |
| Message-ID: | 20091210152627.GK15554@alvh.no-ip.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
Takahiro Itagaki escribió:
> =# EXPLAIN (BUFFERS, ANALYZE) SELECT *
> FROM pgbench_accounts a, pgbench_branches b
> WHERE a.bid = b.bid AND abalance > 0 ORDER BY abalance;
> QUERY PLAN
> ------------------------------------------------------------------------------------------------------------------------------
> Sort (cost=2891.03..2891.04 rows=1 width=461) (actual time=22.494..22.494 rows=0 loops=1)
> Sort Key: a.abalance
> Sort Method: quicksort Memory: 25kB
> Blocks: (shared hit=96 read=1544 written=0) (local hit=0 read=0 written=0) (temp read=0 written=0)
Maybe I missed part of this discussion, but it seems a bit weird to have
an option named "buffers" turn on a line that specifies numbers of
"blocks". I kept looking for where you were specifying the BLOCKS
option to EXPLAIN in the command ...
--
Alvaro Herrera http://www.CommandPrompt.com/
The PostgreSQL Company - Command Prompt, Inc.
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Tom Lane | 2009-12-10 15:44:08 | Re: EXPLAIN BUFFERS |
| Previous Message | Bernd Helmle | 2009-12-10 14:51:34 | Re: [patch] executor and slru dtrace probes |