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Improved concurrency for key cache reassignment
This commit is contained in:
igor@rurik.mysql.com
2003-10-01 18:20:07 -07:00
parent 055daee79d
commit 8e5c62190f
7 changed files with 89 additions and 21 deletions
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20
sql/sql_table.cc
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@ -1620,15 +1620,19 @@ int reassign_keycache_tables(THD* thd, KEY_CACHE_VAR* src_cache,
{
if (key_cache_asmt->to_reassign)
{
bool refresh;
VOID(pthread_mutex_unlock(&LOCK_assign));
bzero((byte *) &table, sizeof(table));
table.option= dest_name;
table.lock_type= TL_READ;
table.db= key_cache_asmt->db_name;
table.alias= table.real_name= key_cache_asmt->table_name;
thd->open_options|= HA_OPEN_TO_ASSIGN;
table.table = open_ltable(thd, &table, TL_READ);
while (!(table.table=open_table(thd,table.db,
table.real_name,table.alias,
&refresh)) && refresh) ;
thd->open_options&= ~HA_OPEN_TO_ASSIGN;
if (!table.table)
DBUG_RETURN(-1);
table.table->pos_in_table_list= &table;
key_cache_asmt->triggered= 1;
rc= table.table->file->assign_to_keycache(thd, 0);
@ -1642,6 +1646,18 @@ int reassign_keycache_tables(THD* thd, KEY_CACHE_VAR* src_cache,
else
key_cache_asmt= key_cache_asmt->next;
}
while (src_cache->assignments)
{
struct st_my_thread_var *waiting_thread= my_thread_var;
pthread_cond_wait(&waiting_thread->suspend, &LOCK_assign);
}
if (src_cache->extra_info)
{
my_free((char *) src_cache->extra_info, MYF(0));
src_cache->extra_info= 0;
}
if (remove_fl && !src_cache->assign_list && src_cache != &dflt_key_cache_var)
{
end_key_cache(&src_cache->cache, 1);