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To save 32KB memory per thread when --log-bin is not used, we do not

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init the binlog_cache (THD::transaction.trans_log).
I have checked all places where trans_log is used, because as now
it may not be inited in some cases, we have to be cautious
(will forward this commit mail to Heikki).


sql/handler.cc:
  Do not use the transaction binlog cache if binlog is not open
sql/sql_class.cc:
  We do not init the transaction binlog cache if binlog is not open.
  This saves 32 KB memory per thread, if --log-bin is not used.
sql/sql_class.h:
  warning comment
This commit is contained in:
unknown
2004-03-26 19:11:37 +01:00
parent 1450ee3a67
commit 11bea84e43
3 changed files with 17 additions and 12 deletions
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6
sql/sql_class.cc
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@@ -169,7 +169,11 @@ THD::THD():user_time(0), current_statement(0), is_fatal_error(0),
tablespace_op=FALSE;
#ifdef USING_TRANSACTIONS
bzero((char*) &transaction,sizeof(transaction));
if (opt_using_transactions)
/*
Binlog is always open (if needed) before a THD is created (including
bootstrap).
*/
if (opt_using_transactions && mysql_bin_log.is_open())
{
if (open_cached_file(&transaction.trans_log,
mysql_tmpdir, LOG_PREFIX, binlog_cache_size,