Erik Rijkers e...@xs4all.nl writes:
On Fri, March 28, 2014 09:31, Heikki Linnakangas wrote:
So thanks to the fast scan patch, I don't think this patch is worth
pursuing anymore. Unless there are some other test case where this patch
helps, but the fast scan patch doesn't.
FWIW, for me the
Alexander Korotkov aekorot...@gmail.com writes:
Next revision of patch is attached. Changes are so:
1) Notion penalty is used instead of size.
2) We try to reduce total penalty to WISH_TRGM_PENALTY, but restriction is
MAX_TRGM_COUNT total trigrams count.
3) Penalties are assigned to
I went back and tried Erik's original test
(http://www.postgresql.org/message-id/dafad644f268ce1503e1b8b682aae38a.squir...@webmail.xs4all.nl).
With a fresh checkout from master, the difference between the slow and
fast queries is much less dramatic than Erik reported. The reason is
that
On Fri, March 28, 2014 09:31, Heikki Linnakangas wrote:
I went back and tried Erik's original test
(http://www.postgresql.org/message-id/dafad644f268ce1503e1b8b682aae38a.squir...@webmail.xs4all.nl).
With a fresh checkout from master, the difference between the slow and
fast queries is much
On Mon, Feb 10, 2014 at 1:01 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Alexander Korotkov aekorot...@gmail.com writes:
On Thu, Jan 16, 2014 at 3:34 AM, Tom Lane t...@sss.pgh.pa.us wrote:
I looked at this patch a bit. It seems like this:
+ *BLANK_COLOR_SIZE - How much blank character is
On Thu, Jan 16, 2014 at 3:34 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Alexander Korotkov aekorot...@gmail.com writes:
Revised version of patch with necessary comments.
I looked at this patch a bit. It seems like this:
+ *BLANK_COLOR_SIZE - How much blank character is more frequent than
Alexander Korotkov aekorot...@gmail.com writes:
On Thu, Jan 16, 2014 at 3:34 AM, Tom Lane t...@sss.pgh.pa.us wrote:
I looked at this patch a bit. It seems like this:
+ *BLANK_COLOR_SIZE - How much blank character is more frequent than
+ * other character in average
On Fri, Jun 21, 2013 at 5:39 PM, Erik Rijkers e...@xs4all.nl wrote:
On Fri, June 21, 2013 15:11, Alexander Korotkov wrote:
On Fri, Jun 21, 2013 at 2:40 PM, Erik Rijkers e...@xs4all.nl wrote:
On Fri, June 21, 2013 05:25, Tom Lane wrote:
Erik Rijkers e...@xs4all.nl writes:
In a 112 MB
Alexander Korotkov aekorot...@gmail.com writes:
Revised version of patch with necessary comments.
I looked at this patch a bit. It seems like this:
+ *BLANK_COLOR_SIZE - How much blank character is more frequent than
+ * other character in average
+ #define
On Fri, June 21, 2013 05:25, Tom Lane wrote:
Erik Rijkers e...@xs4all.nl writes:
In a 112 MB test table (containing random generated text) with a trgm index
(gin_trgm_ops), I consistently get these
timings:
select txt from azjunk6 where txt ~ '^abcd';
130 ms
select txt from azjunk6
On Fri, Jun 21, 2013 at 2:40 PM, Erik Rijkers e...@xs4all.nl wrote:
On Fri, June 21, 2013 05:25, Tom Lane wrote:
Erik Rijkers e...@xs4all.nl writes:
In a 112 MB test table (containing random generated text) with a trgm
index (gin_trgm_ops), I consistently get these
timings:
select txt
On Fri, June 21, 2013 15:11, Alexander Korotkov wrote:
On Fri, Jun 21, 2013 at 2:40 PM, Erik Rijkers e...@xs4all.nl wrote:
On Fri, June 21, 2013 05:25, Tom Lane wrote:
Erik Rijkers e...@xs4all.nl writes:
In a 112 MB test table (containing random generated text) with a trgm
index
9.4devel (but same in 9.3)
In a 112 MB test table (containing random generated text) with a trgm index
(gin_trgm_ops), I consistently get these timings:
select txt from azjunk6 where txt ~ '^abcd';
130 ms
select txt from azjunk6
where txt ~ 'abcd' and substr(txt,1,4) = 'abcd';
3 ms
(a
Erik Rijkers e...@xs4all.nl writes:
In a 112 MB test table (containing random generated text) with a trgm index
(gin_trgm_ops), I consistently get these timings:
select txt from azjunk6 where txt ~ '^abcd';
130 ms
select txt from azjunk6
where txt ~ 'abcd' and substr(txt,1,4) = 'abcd';
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