Ananda Kumar schrieb:
Hi All,
We have table with 99 Million records, with fulltext index.
But when there is not load the sql's performance in just 6 sec, but when
anyother jobs like Index creation or data load is happening its take close
to 3 min for the same query to execute, any ways to improve the performance
of this query.
I have set innodb_buffer=11GB, key_buffer=3GB, 8 CPU, total 16 GB RAM
mysql> explain select
->
->
ITEM_ID,LEAF_CATEG_ID,SLR_ID,ITEM_TITL,CURNT_PRICE_USD,START_PRICE_USD,RSRV_PRICE_USD,BIN_PRICE_USD,QTY_AVAIL,QTY_SOLD,
->
BIDCOUNT,AUCT_DURTN_DAYS,AUCT_TYPE_CODE,SUCCESS_YN,BIN_SOLD_FLAG,BOLD_FEE_FLAG,HIGHLIGHT_FEE_FLAG,GALLERY_FEE_FLAG,
->
GALLERY_FEATURED_FEE_FLAG,FEATURED_FEE_FLAG,GIFT_FEE_FLAG,
are this fields in same order as in table?
DATE_FORMAT(AUCT_START_DATE,'%Y-%m-%d
'> %H:%i:%s'),DATE_FORMAT(AUCT_END_DATE,'%Y-%m-%d
AUCT_START_DATE, AUCT_END_DATE
why DATE_FORMAT? doesn't MySQL return datetime fields already as Y-m-d H:i:s ?
%H:%i:%s'),GMS_USD,RSRV_FLAG from amc_rch where match(ITEM_TITL)
-> AGAINST('BOOKS') > 0 and
why "> 0" ?
CURNT_PRICE_USD between ifnull(null,0) and
ifnull(null,999999999999) limit 1000;
CURNT_PRICE_USD between 0 and 999999999999
why ifnull(null, ...) ?
+----+-------------+---------------+----------+--------------------------+--------------------------+---------+------+------+-------------+
| id | select_type | table | type | possible_keys |
key | key_len | ref | rows | Extra |
+----+-------------+---------------+----------+--------------------------+--------------------------+---------+------+------+-------------+
| 1 | SIMPLE | amc_rch | fulltext | ER_IT_CTX_IDX_0805201045 |
ER_IT_CTX_IDX_0805201045 | 0 | | 1 | Using where |
+----+-------------+---------------+----------+--------------------------+--------------------------+---------+------+------+-------------+
1 row in set (0.05 sec)
--
Sebastian Mendel
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