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Merge moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.0-bug21915

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into  moonlight.intranet:/home/tomash/src/mysql_ab/mysql-5.1-bug21915
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kroki/tomash@moonlight.intranet
2006-10-30 17:57:45 +03:00
parent db952c2faa 1c87434699
commit cf99db484e
2 changed files with 36 additions and 10 deletions
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2
sql/mysql_priv.h
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@ -140,6 +140,8 @@ MY_LOCALE *my_locale_by_name(const char *name);
#define MAX_ACCEPT_RETRY 10 // Test accept this many times #define MAX_ACCEPT_RETRY 10 // Test accept this many times
#define MAX_FIELDS_BEFORE_HASH 32 #define MAX_FIELDS_BEFORE_HASH 32
#define USER_VARS_HASH_SIZE 16 #define USER_VARS_HASH_SIZE 16
#define TABLE_OPEN_CACHE_MIN 64
#define TABLE_OPEN_CACHE_DEFAULT 64
/* /*
Value of 9236 discovered through binary search 2006-09-26 on Ubuntu Dapper Value of 9236 discovered through binary search 2006-09-26 on Ubuntu Dapper

44
sql/mysqld.cc
View File

@ -2663,19 +2663,43 @@ static int init_common_variables(const char *conf_file_name, int argc,
/* connections and databases needs lots of files */ /* connections and databases needs lots of files */
{ {
uint files, wanted_files; uint files, wanted_files, max_open_files;
wanted_files= 10+(uint) max(max_connections*5, /* MyISAM requires two file handles per table. */
max_connections+table_cache_size*2); wanted_files= 10+max_connections+table_cache_size*2;
set_if_bigger(wanted_files, open_files_limit); /*
files= my_set_max_open_files(wanted_files); We are trying to allocate no less than max_connections*5 file
handles (i.e. we are trying to set the limit so that they will
be available). In addition, we allocate no less than how much
was already allocated. However below we report a warning and
recompute values only if we got less file handles than were
explicitly requested. No warning and re-computation occur if we
can't get max_connections*5 but still got no less than was
requested (value of wanted_files).
*/
max_open_files= max(max(wanted_files, max_connections*5),
open_files_limit);
files= my_set_max_open_files(max_open_files);
if (files < wanted_files) if (files < wanted_files)
{ {
if (!open_files_limit) if (!open_files_limit)
{ {
max_connections= (ulong) min((files-10),max_connections); /*
table_cache_size= (ulong) max((files-10-max_connections)/2,64); If we have requested too much file handles than we bring
max_connections in supported bounds.
*/
max_connections= (ulong) min(files-10-TABLE_OPEN_CACHE_MIN*2,
max_connections);
/*
Decrease table_cache_size according to max_connections, but
not below TABLE_OPEN_CACHE_MIN. Outer min() ensures that we
never increase table_cache_size automatically (that could
happen if max_connections is decreased above).
*/
table_cache_size= (ulong) min(max((files-10-max_connections)/2,
TABLE_OPEN_CACHE_MIN),
table_cache_size);
DBUG_PRINT("warning", DBUG_PRINT("warning",
("Changed limits: max_open_files: %u max_connections: %ld table_cache: %ld", ("Changed limits: max_open_files: %u max_connections: %ld table_cache: %ld",
files, max_connections, table_cache_size)); files, max_connections, table_cache_size));
@ -6198,15 +6222,15 @@ The minimum value for this variable is 4096.",
{"table_cache", OPT_TABLE_OPEN_CACHE, {"table_cache", OPT_TABLE_OPEN_CACHE,
"Deprecated; use --table_open_cache instead.", "Deprecated; use --table_open_cache instead.",
(gptr*) &table_cache_size, (gptr*) &table_cache_size, 0, GET_ULONG, (gptr*) &table_cache_size, (gptr*) &table_cache_size, 0, GET_ULONG,
REQUIRED_ARG, 64, 1, 512*1024L, 0, 1, 0}, REQUIRED_ARG, TABLE_OPEN_CACHE_DEFAULT, 1, 512*1024L, 0, 1, 0},
{"table_definition_cache", OPT_TABLE_DEF_CACHE, {"table_definition_cache", OPT_TABLE_DEF_CACHE,
"The number of cached table definitions.", "The number of cached table definitions.",
(gptr*) &table_def_size, (gptr*) &table_def_size, (gptr*) &table_def_size, (gptr*) &table_def_size,
0, GET_ULONG, REQUIRED_ARG, 128, 1, 512*1024L, 0, 1, 0}, 0, GET_ULONG, REQUIRED_ARG, 128, 1, 512*1024L, 0, 1, 0},
{"table_open_cache", OPT_TABLE_OPEN_CACHE, {"table_open_cache", OPT_TABLE_OPEN_CACHE,
"The number of cached open tables.", "The number of cached open tables.",
(gptr*) &table_cache_size, (gptr*) &table_cache_size, (gptr*) &table_cache_size, (gptr*) &table_cache_size, 0, GET_ULONG,
0, GET_ULONG, REQUIRED_ARG, 64, 1, 512*1024L, 0, 1, 0}, REQUIRED_ARG, TABLE_OPEN_CACHE_DEFAULT, 1, 512*1024L, 0, 1, 0},
{"table_lock_wait_timeout", OPT_TABLE_LOCK_WAIT_TIMEOUT, {"table_lock_wait_timeout", OPT_TABLE_LOCK_WAIT_TIMEOUT,
"Timeout in seconds to wait for a table level lock before returning an " "Timeout in seconds to wait for a table level lock before returning an "
"error. Used only if the connection has active cursors.", "error. Used only if the connection has active cursors.",