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Fix for Bug #1952

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"SHOW TABLE STATUS very slow w/large number of tables"
Replaced old algorithm which were used in my_dir() and stored
all information about directory entries in one chunk of memory
with new one which stores file names and MY_STAT structures in
separate memroot, so now we don't need to copy this data during
reallocation of dir_entry array.
This commit is contained in:
dlenev@mysql.com
2003-12-12 03:39:29 +03:00
parent fddab846d4
commit d7ebfbab1c
3 changed files with 190 additions and 166 deletions
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11
include/my_dir.h
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@ -74,14 +74,21 @@ typedef struct my_stat
#endif /* USE_MY_STAT_STRUCT */
typedef struct fileinfo /* Struct returned from my_dir & my_stat */
/* Struct describing one file returned from my_dir */
typedef struct fileinfo
{
char *name;
MY_STAT mystat;
MY_STAT *mystat;
} FILEINFO;
typedef struct st_my_dir /* Struct returned from my_dir */
{
/*
These members are just copies of parts of DYNAMIC_ARRAY structure,
which is allocated right after the end of MY_DIR structure (MEM_ROOT
for storing names is also resides there). We've left them here because
we don't want to change code that uses my_dir.
*/
struct fileinfo *dir_entry;
uint number_off_files;
} MY_DIR;