diff options
| author | unknown <serg@serg.mysql.com> | 2003-01-26 14:20:43 +0100 |
|---|---|---|
| committer | unknown <serg@serg.mysql.com> | 2003-01-26 14:20:43 +0100 |
| commit | 2621b0b97c6feb3176ffd2bcc65e33ded0d7917e (patch) | |
| tree | 3853594e45a9491823f722bcee12a4abba346832 /myisam | |
| parent | 7fe48f6949fdc316b528fecf8b5edcaedb121241 (diff) | |
| download | mariadb-git-2621b0b97c6feb3176ffd2bcc65e33ded0d7917e.tar.gz | |
enadling out-of-cache reads for shared IO_CACHE
Diffstat (limited to 'myisam')
| -rw-r--r-- | myisam/mi_cache.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/myisam/mi_cache.c b/myisam/mi_cache.c index 462e48b3532..8dee068c50e 100644 --- a/myisam/mi_cache.c +++ b/myisam/mi_cache.c @@ -29,7 +29,8 @@ Allows "partial read" errors in the record header (when READING_HEADER flag is set) - unread part is bzero'ed - Note: out-of-cache reads are disabled for shared IO_CACHE's + Note: out-of-cache reads are enabled for shared IO_CACHE's too, + as these reads will be cached by OS cache (and my_pread is always atomic) */ @@ -43,7 +44,7 @@ int _mi_read_cache(IO_CACHE *info, byte *buff, my_off_t pos, uint length, char *in_buff_pos; DBUG_ENTER("_mi_read_cache"); - if (pos < info->pos_in_file && ! info->share) + if (pos < info->pos_in_file) { read_length=length; if ((my_off_t) read_length > (my_off_t) (info->pos_in_file-pos)) @@ -70,7 +71,7 @@ int _mi_read_cache(IO_CACHE *info, byte *buff, my_off_t pos, uint length, } else in_buff_length=0; - if (flag & READING_NEXT || info->share) + if (flag & READING_NEXT) { if (pos != (info->pos_in_file + (uint) (info->read_end - info->request_pos))) |