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set_var.cc, mysqld.cc, ha_innodb.cc, sql_class.h:

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Add a settable session variable innodb_support_xa; setting it to 0 can save up to 10 % of CPU time and 150 bytes of space in each undo log
trx0trx.h, trx0undo.c, trx0trx.c, trx0roll.c:
  Enable XA if innodb_support_xa is not set to 0; make prepare to do log fsync's according to innodb_flush_log_at_trx_commit
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heikki@hundin.mysql.fi
2005-03-13 12:49:39 +02:00
parent 536728c5e8
commit a95f09e228
8 changed files with 127 additions and 53 deletions
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sql/sql_class.h
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@ -578,6 +578,7 @@ struct system_variables
#endif /* HAVE_REPLICATION */
#ifdef HAVE_INNOBASE_DB
my_bool innodb_table_locks;
my_bool innodb_support_xa;
#endif /* HAVE_INNOBASE_DB */
#ifdef HAVE_NDBCLUSTER_DB
ulong ndb_autoincrement_prefetch_sz;