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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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2
sql/sql_const.h
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@ -124,7 +124,7 @@
#define MAX_ACCEPT_RETRY 10 // Test accept this many times
#define MAX_FIELDS_BEFORE_HASH 32
#define USER_VARS_HASH_SIZE 16
#define TABLE_OPEN_CACHE_MIN 400
#define TABLE_OPEN_CACHE_MIN 200
#define TABLE_OPEN_CACHE_DEFAULT 2000
#define TABLE_DEF_CACHE_DEFAULT 400
/**