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branches/zip: Mantis issue #197 - Make srv_spin_wait_delay configurable

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New parameter innodb_spin_wait_delay to set the maximum delay between
polling for a spin lock. 5 is the default.

Approved by: Marko (on IM)
This commit is contained in:
calvin 2009-04-02 11:46:47 +00:00
parent c9534b6ec3
commit dacfdf4a1d
3 changed files with 8 additions and 2 deletions
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6
handler/ha_innodb.cc
View file

@ -9640,6 +9640,11 @@ static MYSQL_SYSVAR_ULONG(sync_spin_loops, srv_n_spin_wait_rounds,
"Count of spin-loop rounds in InnoDB mutexes",
NULL, NULL, 20L, 0L, ~0L, 0);
static MYSQL_SYSVAR_ULONG(spin_wait_delay, srv_spin_wait_delay,
PLUGIN_VAR_OPCMDARG,
"Maximum delay between polling for a spin lock (5 by default)",
NULL, NULL, 5L, 0L, ~0L, 0);
static MYSQL_SYSVAR_ULONG(thread_concurrency, srv_thread_concurrency,
PLUGIN_VAR_RQCMDARG,
"Helps in performance tuning in heavily concurrent environments. Sets the maximum number of threads allowed inside InnoDB. Value 0 will disable the thread throttling.",
@ -9724,6 +9729,7 @@ static struct st_mysql_sys_var* innobase_system_variables[]= {
MYSQL_SYSVAR(strict_mode),
MYSQL_SYSVAR(support_xa),
MYSQL_SYSVAR(sync_spin_loops),
MYSQL_SYSVAR(spin_wait_delay),
MYSQL_SYSVAR(table_locks),
MYSQL_SYSVAR(thread_concurrency),
MYSQL_SYSVAR(thread_sleep_delay),

2
include/srv0srv.h
View file

@ -185,7 +185,7 @@ extern ibool srv_error_monitor_active;
extern ulong srv_n_spin_wait_rounds;
extern ulong srv_n_free_tickets_to_enter;
extern ulong srv_thread_sleep_delay;
extern ulint srv_spin_wait_delay;
extern ulong srv_spin_wait_delay;
extern ibool srv_priority_boost;
extern ulint srv_mem_pool_size;

2
srv/srv0srv.c
View file

@ -341,7 +341,7 @@ UNIV_INTERN ulong srv_replication_delay = 0;
UNIV_INTERN ulong srv_n_spin_wait_rounds = 20;
UNIV_INTERN ulong srv_n_free_tickets_to_enter = 500;
UNIV_INTERN ulong srv_thread_sleep_delay = 10000;
UNIV_INTERN ulint srv_spin_wait_delay = 5;
UNIV_INTERN ulong srv_spin_wait_delay = 5;
UNIV_INTERN ibool srv_priority_boost = TRUE;
#ifdef UNIV_DEBUG