更新时间:2024-09-11 GMT+08:00
验证并行查询效果
本章节使用TPCH测试工具测试并行查询对22条QUERY的性能提升情况。
测试的实例信息如下:
- 实例规格:32 vCPUs | 256 GB
- 内核版本:2.0.26.1
- 并行线程数:16
- 测试数据量:100GB
操作步骤
- 生成测试数据。
- 请在https://github.com/electrum/tpch-dbgen下载TPCH共用源码。
- 请在下载的源码文件中,找到makefile.suite文件,并按照如下内容进行修改,修改完成后进行保存。
CC = gcc # Current values for DATABASE are: INFORMIX, DB2, TDAT (Teradata) # SQLSERVER, SYBASE, ORACLE # Current values for MACHINE are: ATT, DOS, HP, IBM, ICL, MVS, # SGI, SUN, U2200, VMS, LINUX, WIN32 # Current values for WORKLOAD are: TPCH DATABASE= SQLSERVER MACHINE = LINUX WORKLOAD = TPCH
- 在源码根目录下,执行下列命令,编译生成TPCH数据工具dbgen。
- 使用dbgen执行如下命令,生成TPCH数据100G。
- 登录目标GaussDB(for MySQL)实例,创建目标数据库,并使用如下命令创建TPCH的表。
CREATE TABLE nation ( N_NATIONKEY INTEGER NOT NULL, N_NAME CHAR(25) NOT NULL, N_REGIONKEY INTEGER NOT NULL, N_COMMENT VARCHAR(152)); CREATE TABLE region ( R_REGIONKEY INTEGER NOT NULL, R_NAME CHAR(25) NOT NULL, R_COMMENT VARCHAR(152)); CREATE TABLE part ( P_PARTKEY INTEGER NOT NULL, P_NAME VARCHAR(55) NOT NULL, P_MFGR CHAR(25) NOT NULL, P_BRAND CHAR(10) NOT NULL, P_TYPE VARCHAR(25) NOT NULL, P_SIZE INTEGER NOT NULL, P_CONTAINER CHAR(10) NOT NULL, P_RETAILPRICE DECIMAL(15,2) NOT NULL, P_COMMENT VARCHAR(23) NOT NULL ); CREATE TABLE supplier ( S_SUPPKEY INTEGER NOT NULL, S_NAME CHAR(25) NOT NULL, S_ADDRESS VARCHAR(40) NOT NULL, S_NATIONKEY INTEGER NOT NULL, S_PHONE CHAR(15) NOT NULL, S_ACCTBAL DECIMAL(15,2) NOT NULL, S_COMMENT VARCHAR(101) NOT NULL); CREATE TABLE partsupp ( PS_PARTKEY INTEGER NOT NULL, PS_SUPPKEY INTEGER NOT NULL, PS_AVAILQTY INTEGER NOT NULL, PS_SUPPLYCOST DECIMAL(15,2) NOT NULL, PS_COMMENT VARCHAR(199) NOT NULL ); CREATE TABLE customer ( C_CUSTKEY INTEGER NOT NULL, C_NAME VARCHAR(25) NOT NULL, C_ADDRESS VARCHAR(40) NOT NULL, C_NATIONKEY INTEGER NOT NULL, C_PHONE CHAR(15) NOT NULL, C_ACCTBAL DECIMAL(15,2) NOT NULL, C_MKTSEGMENT CHAR(10) NOT NULL, C_COMMENT VARCHAR(117) NOT NULL); CREATE TABLE orders ( O_ORDERKEY INTEGER NOT NULL, O_CUSTKEY INTEGER NOT NULL, O_ORDERSTATUS CHAR(1) NOT NULL, O_TOTALPRICE DECIMAL(15,2) NOT NULL, O_ORDERDATE DATE NOT NULL, O_ORDERPRIORITY CHAR(15) NOT NULL, O_CLERK CHAR(15) NOT NULL, O_SHIPPRIORITY INTEGER NOT NULL, O_COMMENT VARCHAR(79) NOT NULL); CREATE TABLE lineitem ( L_ORDERKEY INTEGER NOT NULL, L_PARTKEY INTEGER NOT NULL, L_SUPPKEY INTEGER NOT NULL, L_LINENUMBER INTEGER NOT NULL, L_QUANTITY DECIMAL(15,2) NOT NULL, L_EXTENDEDPRICE DECIMAL(15,2) NOT NULL, L_DISCOUNT DECIMAL(15,2) NOT NULL, L_TAX DECIMAL(15,2) NOT NULL, L_RETURNFLAG CHAR(1) NOT NULL, L_LINESTATUS CHAR(1) NOT NULL, L_SHIPDATE DATE NOT NULL, L_COMMITDATE DATE NOT NULL, L_RECEIPTDATE DATE NOT NULL, L_SHIPINSTRUCT CHAR(25) NOT NULL, L_SHIPMODE CHAR(10) NOT NULL, L_COMMENT VARCHAR(44) NOT NULL);
- 使用如下命令,将生成的数据导入到TPCH的表中。
load data INFILE '/path/customer.tbl' INTO TABLE customer FIELDS TERMINATED BY '|'; load data INFILE '/path/region.tbl' INTO TABLE region FIELDS TERMINATED BY '|'; load data INFILE '/path/nation.tbl' INTO TABLE nation FIELDS TERMINATED BY '|'; load data INFILE '/path/supplier.tbl' INTO TABLE supplier FIELDS TERMINATED BY '|'; load data INFILE '/path/part.tbl' INTO TABLE part FIELDS TERMINATED BY '|'; load data INFILE '/path/partsupp.tbl' INTO TABLE partsupp FIELDS TERMINATED BY '|'; load data INFILE '/path/orders.tbl' INTO TABLE orders FIELDS TERMINATED BY '|'; load data INFILE '/path/lineitem.tbl' INTO TABLE lineitem FIELDS TERMINATED BY '|';
- 创建TPCH表的索引。
alter table region add primary key (r_regionkey); alter table nation add primary key (n_nationkey); alter table part add primary key (p_partkey); alter table supplier add primary key (s_suppkey); alter table partsupp add primary key (ps_partkey,ps_suppkey); alter table customer add primary key (c_custkey); alter table lineitem add primary key (l_orderkey,l_linenumber); alter table orders add primary key (o_orderkey);
- 请在https://github.com/dragansah/tpch-dbgen/tree/master/tpch-queries获取TPCH 22个查询query语句,并进行相应操作。
测试结果
通过采用16线程并行查询,其中的17条QUERY的性能得到明显提升,查询速度平均提升10倍以上。TPCH性能测试结果如下图所示。
图1 测试结果
父主题: 并行查询(PQ)