On 6/12/08, Ananda Kumar <[EMAIL PROTECTED]> wrote:
>
>
>
> 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 ----will this have any performance impact.
>
> 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
>>
>
>
