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Marko Tiikkaja 90e2e2b896 database/sql: Avoid re-preparing statements when all connections are busy
Previously, if all connections were busy, we would always
re-prepare the statement on the connection we were assigned from
the pool.  That meant that if all connections were busy most of the
time, the number of prepared statements for each connection would
keep increasing over time.

Instead, after getting a free connection, check to see if the
statement has already been prepared on it, and reuse the statement
handle if so.

LGTM=bradfitz
R=golang-codereviews, gobot, bradfitz
CC=golang-codereviews
https://golang.org/cl/116930043
2014-09-02 09:08:41 -07:00
api unicode: strconv: regexp: Upgrade to Unicode 7.0.0. 2014-08-18 20:26:10 +02:00
doc spec: Fix indentation and remove trailing white space characters. 2014-08-30 10:27:01 -07:00
include cmd/ld: diagnose Go calling C 2014-08-31 22:49:14 -04:00
lib codereview: do not hit upload_complete on first patch 2014-08-06 16:12:24 -04:00
misc misc/cgo/testcdefs: comment out test of packed structs 2014-08-31 22:59:43 -04:00
src database/sql: Avoid re-preparing statements when all connections are busy 2014-09-02 09:08:41 -07:00
test runtime: increase nosplit area to 192 2014-08-30 00:56:52 -04:00
.hgignore lib9: enable on Plan 9 2014-02-13 20:06:41 +01:00
.hgtags tag go1.3.1 2014-08-13 14:54:54 +10:00
AUTHORS A+C: Joe Shaw (individual CLA) 2014-08-26 14:24:04 -07:00
CONTRIBUTORS CONTRIBUTORS: add Rick Hudson (Google CLA) 2014-08-27 11:10:01 -04:00
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README README: Fix installation instructions 2013-11-20 13:47:37 -08:00
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This is the source code repository for the Go programming language.  

For documentation about how to install and use Go,
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After installing Go, you can view a nicely formatted
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Unless otherwise noted, the Go source files are distributed
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--

Binary Distribution Notes

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variable if you unpack it into /usr/local/go, or if you rebuild
from sources by running all.bash (see doc/install.html).
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For example, if you extracted the tar file into $HOME/go, you might
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    export GOROOT=$HOME/go
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See doc/install.html for more details.