Hello! Thanks for your reply!

Unfortunately,the above query is a sub query of a big query.So I think I
can't overcome it.How about integration with spark?Will spark deal with such
queries in a smart way? 


ilya.kasnacheev wrote
> Hello!
> 
> The recommendation here is to use Lazy SQL Queries.
> https://apacheignite-sql.readme.io/docs/performance-and-debugging#section-result-set-lazy-loading
> Then, be careful to process data in small batches and avoid holding on to
> large subsets of result set.
> 
> Regards,
> -- 
> Ilya Kasnacheev
> 
> 
> пн, 17 дек. 2018 г. в 16:08, yangjiajun <

> 1371549332@

>>:
> 
>> Hello.
>>
>> I do a simple sql join operation on a ignite node which is version 2.6
>> and
>> has 22GB heap memory and 22 GB off-heap memory.I also enable
>> persistence.The
>> query exhausted ignite's heap memory quickly.How can I overcome this
>> situation.
>>
>> Here is my query:
>> explain
>> SELECT
>>         t2.*,
>>         t1.SHIPDOMESTICFLAG,
>>         t1.RESOURCEALLOCATIONTYPE,
>>         t1.URGENTFLAG,
>>         t1.EXPEDITEDFLAG,
>>         CONCAT( '%',
>>         t2.DELIVERY_CENTER_CODE,
>>         '%' ) AS DELIVERY_CENTER_CODE_1
>> FROM
>>          TABLE_6978_R_1_1 t1,TABLE_6930_R_1_1 t2
>> WHERE
>>         t2.ORIGINAL_CONTRACT_NUM = t1.ORIGINALCONTRACTNUM
>>
>> And here is the query plan:
>> SELECT
>>     T2.CONTRACT_NUMBER,
>>     T2.ORDER_ASSEMBLY_DEPT,
>>     T2.ORDER_NUMBER,
>>     T2.ORIGINAL_CONTRACT_NUM,
>>     T2.SHIPMENT_BATCH_DESC,
>>     T2.EPD,
>>     T2.REQUEST_PACK_DATE,
>>     T2.ORGANIZATION_ID,
>>     T2.CPP_STATUS,
>>     T2.BG_TYPE,
>>     T2.PSD,
>>     T2.ORDER_PRIORITY,
>>     T2.ADVANCED_ARRIVAL_FLAG,
>>     T2.ITEM_ATTR_FLAG,
>>     T2.ITEM_CODE,
>>     T2.ORDERED_QUANTITY,
>>     T2.DELIVERY_CENTER_CODE,
>>     T2.OTO_CREATION_DATE,
>>     T2.ITEMID,
>>     T2.LINEID,
>>     T2.ROMA3C_BSP_NATIVE_COLUMN,
>>     T1.SHIPDOMESTICFLAG,
>>     T1.RESOURCEALLOCATIONTYPE,
>>     T1.URGENTFLAG,
>>     T1.EXPEDITEDFLAG,
>>     CONCAT('%', T2.DELIVERY_CENTER_CODE, '%') AS DELIVERY_CENTER_CODE_1
>> FROM PUBLIC.TABLE_6978_R_1_1 T1
>>     /* PUBLIC.TABLE_6978_R_1_1.__SCAN_ */
>> INNER JOIN PUBLIC.TABLE_6930_R_1_1 T2
>>     /* PUBLIC.TABLE_6930_R_1_1_ORIGINAL_CONTRACT_NUM_IDX:
>> ORIGINAL_CONTRACT_NUM = T1.ORIGINALCONTRACTNUM */
>>     ON 1=1
>> WHERE T2.ORIGINAL_CONTRACT_NUM = T1.ORIGINALCONTRACTNUM
>>
>>
>> Table t1 has about 1.5 million records.Table t2 has 6w records.
>>
>>
>>
>> --
>> Sent from: http://apache-ignite-users.70518.x6.nabble.com/
>>





--
Sent from: http://apache-ignite-users.70518.x6.nabble.com/

Reply via email to