| From: | Euler Taveira de Oliveira <euler(at)timbira(dot)com> |
|---|---|
| To: | Itagaki Takahiro <itagaki(dot)takahiro(at)oss(dot)ntt(dot)co(dot)jp> |
| Cc: | 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: | 2009-12-07 16:15:57 |
| Message-ID: | 4B1D2A3D.8090007@timbira.com |
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| Lists: | pgsql-hackers |
Itagaki Takahiro escreveu:
> I think the current output is enough and useful in normal use.
> We can use XML or JSON format for more details.
>
I don't think it is a good idea to have different information in different
formats. I'm with Robert; *don't* do that. If you want to suppress the other
ones in text format, do it in the others too. One idea is to add them only if
we prefer the VERBOSE output.
> I think
> Blocks Hit: 1641 Read: 0 Temp Read: 1443
> means
> Blocks (Hit: 1641 Read: 0 Temp Read: 1443)
> i.e., Blocks of hit, blocks of reads, and Blocks of temp reads.
>
But the latter is more clear than the former.
> I cannot understand what you mean -- should I suppress the lines when they
> have all-zero values?
>
There are nodes that don't read or write blocks. If we go this way, we need to
document this behavior.
--
Euler Taveira de Oliveira
http://www.timbira.com/
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