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Adjust table_open_cache to avoid getting error 24 (too many open files)

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MDEV--15609 engines/funcs.crash_manytables_number crashes with error 24
           (too many open files)
MDEV-10286  Adjustment of table_open_cache according to system limits
            does not work when open-files-limit option is provided

Fixed by adjusting tc_size downwards if there is not enough file
descriptors to use.

Other changes:
- Ensure that there is 30 (was 10) extra file descriptors for other usage
- Decrease TABLE_OPEN_CACHE_MIN to 200 as it's better to have a smaller
  table cache than getting error 24
- Increase minimum of max_connections and table_open_cache from 1 to 10
  as 1 is not usable for any real application, only for testing.
This commit is contained in:
Monty
2018-03-22 20:03:54 +02:00
parent 4d83b01537
commit ca0c96fc89
29 changed files with 193 additions and 85 deletions
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17
mysql-test/suite/perfschema/t/hostcache_ipv4_max_con.test
View File

@ -176,9 +176,17 @@ disconnect con4c;
--source ../include/wait_for_pfs_thread_count.inc
set global max_user_connections = 0;
set global max_connections = 3;
set global max_connections = 10;
flush user_resources;
connect (tmp_con1,localhost,root,,);
connect (tmp_con2,localhost,root,,);
connect (tmp_con3,localhost,root,,);
connect (tmp_con4,localhost,root,,);
connect (tmp_con5,localhost,root,,);
connect (tmp_con6,localhost,root,,);
connect (tmp_con7,localhost,root,,);
connect (con5a,"127.0.0.1",quota,,test,$MASTER_MYPORT,);
select "Con4a is alive";
select current_user();
@ -233,6 +241,13 @@ connect (con5d,"127.0.0.1",quota,,test,$MASTER_MYPORT,);
disconnect con5a;
disconnect con5b;
--disconnect tmp_con1
--disconnect tmp_con2
--disconnect tmp_con3
--disconnect tmp_con4
--disconnect tmp_con5
--disconnect tmp_con6
--disconnect tmp_con7
# Wait for all disconnects
--source ../include/wait_for_pfs_thread_count.inc