Commit 6a503b67 authored by unknown's avatar unknown
Browse files

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

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


sql/mysql_priv.h:
  Auto merged
parents 26770e3a b372ebc5

sql/mysql_priv.h

+2 −0
Original line number Diff line number Diff line
@@ -131,6 +131,8 @@ MY_LOCALE *my_locale_by_name(const char *name); 
#define MAX_ACCEPT_RETRY	10	// Test accept this many times

#define MAX_FIELDS_BEFORE_HASH	32

#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

sql/mysqld.cc

+33 −9
Original line number Diff line number Diff line
@@ -2641,19 +2641,43 @@ static int init_common_variables(const char *conf_file_name, int argc, 


  /* 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,

				 max_connections+table_cache_size*2);

    set_if_bigger(wanted_files, open_files_limit);

    files= my_set_max_open_files(wanted_files);

    /* MyISAM requires two file handles per table. */

    wanted_files= 10+max_connections+table_cache_size*2;

    /*

      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 (!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",

		   ("Changed limits: max_open_files: %u  max_connections: %ld  table_cache: %ld",

		    files, max_connections, table_cache_size));
@@ -5943,8 +5967,8 @@ The minimum value for this variable is 4096.", 
   0, 0, 0, 0},

  {"table_cache", OPT_TABLE_CACHE,

   "The number of open tables for all threads.", (gptr*) &table_cache_size,

   (gptr*) &table_cache_size, 0, GET_ULONG, REQUIRED_ARG, 64, 1, 512*1024L,

   0, 1, 0},

   (gptr*) &table_cache_size, 0, GET_ULONG, REQUIRED_ARG,

   TABLE_OPEN_CACHE_DEFAULT, 1, 512*1024L, 0, 1, 0},

  {"table_lock_wait_timeout", OPT_TABLE_LOCK_WAIT_TIMEOUT, "Timeout in "

    "seconds to wait for a table level lock before returning an error. Used"

     " only if the connection has active cursors.",