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Bug#55001 Change in behavior: thread_concurrency (docs,

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example files)

The system variable 'thread_concurrency' has been
(re-)enabled on all platforms, to prevent startup
errors.

'thread_concurrency' is unused and has no effect,
on any platform, in MySQL 5.1 and later versions.  It 
will be deprecated, and removed, in context of 
worklog WL#5265


mysql-test/include/have_thread_concurrency.inc:
  include/have_thread_concurrency.inc was only needed
  to support platforms that didn't have the
  thread_concurrency variable available.  Since the
  variable is now available on all platforms, the file
  is removed.
This commit is contained in:
Magne Mahre
2010-08-16 15:05:01 +02:00
parent 5c7ac4aa7a
commit a3b9557b3a
3 changed files with 5 additions and 13 deletions
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10
mysql-test/include/have_thread_concurrency.inc
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@ -1,10 +0,0 @@
disable_query_log;
disable_result_log;
set @have_thread_concurrency=0;
select @have_thread_concurrency:=1 from information_schema.global_variables where variable_name='thread_concurrency';
if (`select @have_thread_concurrency = 0`)
{
skip Need @@thread_concurrency;
}
enable_result_log;
enable_query_log;

1
mysql-test/suite/sys_vars/t/thread_concurrency_basic.test
View File

@ -1,4 +1,3 @@
--source include/have_thread_concurrency.inc
#
# only global
#

7
sql/sys_vars.cc
View File

@ -1617,14 +1617,17 @@ static Sys_var_charptr Sys_socket(
READ_ONLY GLOBAL_VAR(mysqld_unix_port), CMD_LINE(REQUIRED_ARG),
IN_FS_CHARSET, DEFAULT(0));
#ifdef HAVE_THR_SETCONCURRENCY
/*
thread_concurrency is a no-op on all platforms since
MySQL 5.1. It will be removed in the context of
WL#5265
*/
static Sys_var_ulong Sys_thread_concurrency(
"thread_concurrency",
"Permits the application to give the threads system a hint for "
"the desired number of threads that should be run at the same time",
READ_ONLY GLOBAL_VAR(concurrency), CMD_LINE(REQUIRED_ARG),
VALID_RANGE(1, 512), DEFAULT(DEFAULT_CONCURRENCY), BLOCK_SIZE(1));
#endif
static Sys_var_ulong Sys_thread_stack(
"thread_stack", "The stack size for each thread",