| From: | Robert Haas <robertmhaas(at)gmail(dot)com> |
|---|---|
| To: | Takeshi Yamamuro <yamamuro(dot)takeshi(at)lab(dot)ntt(dot)co(dot)jp> |
| Cc: | Andrew Dunstan <andrew(at)dunslane(dot)net>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Improve compression speeds in pg_lzcompress.c |
| Date: | 2013-01-08 13:20:42 |
| Message-ID: | CA+Tgmoaiw4brYWApZekTPNOrXfzhowG+LNKmyS8R2kp7Y8Gb6w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Tue, Jan 8, 2013 at 4:04 AM, Takeshi Yamamuro
<yamamuro(dot)takeshi(at)lab(dot)ntt(dot)co(dot)jp> wrote:
> Apart from my patch, what I care is that the current one might
> be much slow against I/O. For example, when compressing
> and writing large values, compressing data (20-40MiB/s) might be
> a dragger against writing data in disks (50-80MiB/s). Moreover,
> IMHO modern (and very fast) I/O subsystems such as SSD make a
> bigger issue in this case.
What about just turning compression off?
--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company
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