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Reuse THD for new user connections

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- To ensure that mallocs are marked for the correct THD, even if it's
  allocated in another thread, I added the thread_id to the THD constructor
- Added st_my_thread_var to thr_lock_info_init() to avoid a call to my_thread_var
- Moved things from THD::THD() to THD::init()
- Moved some things to THD::cleanup()
- Added THD::free_connection() and THD::reset_for_reuse()
- Added THD to CONNECT::create_thd()
- Added THD::thread_dbug_id and st_my_thread_var->dbug_id. These are needed
  to ensure that we have a constant thread_id used for debugging with a THD,
  even if it changes thread_id (=connection_id)
- Set variables.pseudo_thread_id in constructor. Removed not needed sets.
This commit is contained in:
Monty
2016-04-07 19:51:40 +03:00
committed by Sergei Golubchik
parent 54f3e18f6e
commit 89685d55d7
34 changed files with 220 additions and 130 deletions
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2
sql/sql_udf.cc
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@ -154,7 +154,7 @@ void udf_init()
mysql_rwlock_init(key_rwlock_THR_LOCK_udf, &THR_LOCK_udf);
init_sql_alloc(&mem, UDF_ALLOC_BLOCK_SIZE, 0, MYF(0));
THD *new_thd = new THD;
THD *new_thd = new THD(0);
if (!new_thd ||
my_hash_init(&udf_hash,system_charset_info,32,0,0,get_hash_key, NULL, 0))
{