On 6/12/08, Sebastian Mendel <[EMAIL PROTECTED]> wrote:
>
> 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?
no not in the same order
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 ?
Good catch, mysql gives in the y-m-d H:i:s format
%H:%i:%s'),GMS_USD,RSRV_FLAG from amc_rch where match(ITEM_TITL)
>> -> AGAINST('BOOKS') > 0 and
>>
>
> why "> 0" ?
I need to check with developer
CURNT_PRICE_USD between ifnull(null,0) and
>> ifnull(null,999999999999) limit 1000;
>>
>
> CURNT_PRICE_USD between 0 and 999999999999
Also need to check with developer, Just guessing, they want for prince
between 0 and 99999999999
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
>
