问题描述
我正在尝试在 MysqL 服务器中运行 TPC-H 查询。 目前，我使用的是 8.0.23 版本（当我以某种方式使用 8.0.19 时没有出现错误）。 TPC-H 的基准大小为 10 GB。
当我使用 8 个线程同时提交多个查询时，我收到此错误（1114 错误，表 /tmp/#sql~~~ 已满）。有可能使用不同的线程同时提交相同或相似的查询。
然而，当我只在 MysqL shell 中提交一个查询时，它会返回一个没有错误的结果。
with year_total as ( select c_customer_id customer_id,c_first_name customer_first_name,c_last_name customer_last_name,c_preferred_cust_flag customer_preferred_cust_flag,c_birth_country customer_birth_country,c_login customer_login,c_email_address customer_email_address,d_year dyear,sum(((ss_ext_list_price-ss_ext_wholesale_cost-ss_ext_discount_amt)+ss_ext_sales_price)/2) year_total,'s' sale_type from tpcds1.customer,tpcds1.store_sales,tpcds1.date_dim where c_customer_sk = ss_customer_sk and ss_sold_date_sk = d_date_sk group by c_customer_id,c_first_name,c_last_name,c_preferred_cust_flag,c_birth_country,c_login,c_email_address,d_year union all select c_customer_id customer_id,sum((((cs_ext_list_price-cs_ext_wholesale_cost-cs_ext_discount_amt)+cs_ext_sales_price)/2) ) year_total,'c' sale_type from tpcds1.customer,tpcds1.catalog_sales,tpcds1.date_dim where c_customer_sk = cs_bill_customer_sk and cs_sold_date_sk = d_date_sk group by c_customer_id,sum((((ws_ext_list_price-ws_ext_wholesale_cost-ws_ext_discount_amt)+ws_ext_sales_price)/2) ) year_total,'w' sale_type from tpcds1.customer,tpcds1.web_sales,tpcds1.date_dim where c_customer_sk = ws_bill_customer_sk and ws_sold_date_sk = d_date_sk group by c_customer_id,d_year ) select t_s_secyear.customer_id,t_s_secyear.customer_first_name,t_s_secyear.customer_last_name,t_s_secyear.customer_login from year_total t_s_firstyear,year_total t_s_secyear,year_total t_c_firstyear,year_total t_c_secyear,year_total t_w_firstyear,year_total t_w_secyear where t_s_secyear.customer_id = t_s_firstyear.customer_id and t_s_firstyear.customer_id = t_c_secyear.customer_id and t_s_firstyear.customer_id = t_c_firstyear.customer_id and t_s_firstyear.customer_id = t_w_firstyear.customer_id and t_s_firstyear.customer_id = t_w_secyear.customer_id and t_s_firstyear.sale_type = 's' and t_c_firstyear.sale_type = 'c' and t_w_firstyear.sale_type = 'w' and t_s_secyear.sale_type = 's' and t_c_secyear.sale_type = 'c' and t_w_secyear.sale_type = 'w' and t_s_firstyear.dyear = 1999 and t_s_secyear.dyear = 1999+1 and t_c_firstyear.dyear = 1999 and t_c_secyear.dyear = 1999+1 and t_w_firstyear.dyear = 1999 and t_w_secyear.dyear = 1999+1 and t_s_firstyear.year_total > 0 and t_c_firstyear.year_total > 0 and t_w_firstyear.year_total > 0 and case when t_c_firstyear.year_total > 0 then t_c_secyear.year_total / t_c_firstyear.year_total else null end > case when t_s_firstyear.year_total > 0 then t_s_secyear.year_total / t_s_firstyear.year_total else null end and case when t_c_firstyear.year_total > 0 then t_c_secyear.year_total / t_c_firstyear.year_total else null end > case when t_w_firstyear.year_total > 0 then t_w_secyear.year_total / t_w_firstyear.year_total else null end order by t_s_secyear.customer_id,t_s_secyear.customer_login limit 100
我检查了这个线程， error while executing sql file (ERROR 1114 mysql table is full)
然而，它没有帮助。这是我从上面的链接中查看的列表。
- 我有足够的磁盘空间。
- 我增加了 max_heap_table_size 和 tmp_table_size 的大小，如下所示。
- 我重新启动了 MysqL 服务器。
- innodb_data_file_path 设置为自动扩展。所以，我希望它能够自动扩展。
我还检查了我的 tmpdir 是否设置正确并且有足够的磁盘空间。
这是我的 MysqL 配置。
innodb_buffer_pool_size=16GB
select @@innodb_buffer_pool_size; -> 17179869184
select @@max_heap_table_size; -> 2147483648
select @@tmp_table_size; -> 2147483648
+-----------------------+------------------------+
| Variable_name | Value |
+-----------------------+------------------------+
| innodb_data_file_path | ibdata1:10M:autoextend |
+-----------------------+------------------------+
任何建议将不胜感激。感谢阅读。
解决方法
事实证明，我需要更改 temptable_max_ram（默认为 1 GB），因为 MySQL 使用 TempTable 作为默认值。
如果我将 internal_tmp_mem_storage_engine 设置为 MEMORY（来自 TempTable），那么更改 tmp_table_size,max_heap_table_size 就可以了。