database/mariadb
1
0
Fork 0
mirror of https://github.com/MariaDB/server.git synced 2026-01-06 05:22:24 +03:00
Code Activity

Fix for Bug #1952

Browse Source 
"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.


include/my_dir.h:
  Changed mystat member of FILEINFO structure to pointer since 
  this prevents unneeded memory allocation and initialization.
  Added comment about new hidden members of MY_DIR structure.
mysys/my_lib.c:
  Replaced old algorithm in my_dir() which 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. Now we don't copy this data during reallocation of 
  array with FILEINFO structures.
  Also tuned sizes of memory chunks during first-other
  reallocations (we suppose that we either have < 100 files 
  in the directory or > 1000 of them).
sql/sql_show.cc:
  Updated only place in code where mystat member
  of FILEINFO structure is used.
This commit is contained in:
unknown
2003-12-12 03:39:29 +03:00
parent 22c12eaeb2
commit c545b02645
3 changed files with 190 additions and 166 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
sql/sql_show.cc
View File

@@ -213,7 +213,7 @@ mysql_find_files(THD *thd,List<char> *files, const char *db,const char *path,
else
#endif
{
if (file->name[0] == '.' || !MY_S_ISDIR(file->mystat.st_mode) ||
if (file->name[0] == '.' || !MY_S_ISDIR(file->mystat->st_mode) ||
(wild && wild_compare(file->name,wild)))
continue;
}