pg效能測試

資料庫

postgresql

版本9.6

系統linux centos 7.3

共享記憶體

1280m

其它配置

保持預設

--建立隨機日期時間函式      

create or replace function rand_date_time(start_date date, end_date date) returns timestamp as 

$body$ 

declare 

interval_days integer; 

random_seconds integer; 

random_dates integer; 

random_date date; 

random_time time; 

begin 

interval_days := end_date - start_date; 

random_dates:= trunc(random()*interval_days);

random_date := start_date + random_dates;

random_seconds:= trunc(random()*3600*24);

random_time:=' 00:00:00'::time+(random_seconds || ' second')::interval;

return random_date +random_time; 

end;  

$body$

language plpgsql; 

--建立隨機數的儲存過程

create or replace function f_random_str(length integer) returns character varying

language plpgsql

as $$

declare

result varchar(50);

begin

select array_to_string(array(select chr((65 + round(random() * 25)) :: integer)

from generate_series(1,length)), '') into result;

return result;

enddrop table if exists tbl_index5000;

create table if not exists tbl_index5000(a bigint,b timestamp without time zone, c varchar(16), d varchar(32), e varchar(48));

insert into tbl_index5000 (a,b,c,d,e)  select generate_series(1,5000*10000), '2019-06-05',f_random_str(16),f_random_str(32),f_random_str(48);

create index index_a1 on tbl_index1 using btree(a);

create index index_a10 on tbl_index10 using btree(a);

create index index_a100 on tbl_index100 using btree(a);

create index index_a1000 on tbl_index1000 using btree(a);

create index index_a5000 on tbl_index5000 using btree(a);

create index index_b1 on tbl_index1 using btree(b);

create index index_b10 on tbl_index10 using btree(b);

create index index_b100 on tbl_index100 using btree(b);

create index index_b1000 on tbl_index1000 using btree(b);

create index index_b5000 on tbl_index5000 using btree(b);

create index index_c1 on tbl_index1 using btree(c);

create index index_c10 on tbl_index10 using btree(c);

create index index_c100 on tbl_index100 using btree(c);

create index index_c1000 on tbl_index1000 using btree(c);

create index index_c5000 on tbl_index5000 using btree(c);

create index index_a10000 on tbl_index10000 using btree(a);

create index index_b10000 on tbl_index10000 using btree(b);

create index index_c10000 on tbl_index10000 using btree(c);

select "count"(*) from tbl_index1;

select "count"(*) from tbl_index10;

select "count"(*) from tbl_index100;

select "count"(*) from tbl_index1000;

select "count"(*) from tbl_index5000;

select "count"(*) from tbl_index10000;

select * from tbl_index1 where a=123456;

select * from tbl_index10 where a=123456;

select * from tbl_index100 where a=123456;

select * from tbl_index1000 where a=123456;

select * from tbl_index5000 where a=123456;

select * from tbl_index10000 where a=123456;

select * from tbl_index1 where b='2019-06-05 15:46:56';

select * from tbl_index10 where b='2019-06-05 15:46:56';

select * from tbl_index100 where b='2019-06-05 15:46:56';

select * from tbl_index1000 where b='2019-06-05 14:46:56';

select * from tbl_index5000 where b='2019-06-06 14:46:56';

select * from tbl_index10000 where b='2019-06-05 14:46:56';

select * from tbl_index1 where c='fkxxejjyrqsjkvtt';

select * from tbl_index10 where c='fkxxejjyrqsjkvtt';

select * from tbl_index100 where c='fkxxejjyrqsjkvtt';

select * from tbl_index1000 where c='fkxxejjyrqsjkvtt';

select * from tbl_index5000 where c='fkxxejjyrqsjkvtt';

select * from tbl_index10000 where c='fkxxejjyrqsjkvtt';

select * from tbl_index1 where d='eidrqtlvyjmnnyrskpqnyzmqqeabauue';

select * from tbl_index10 where d='eidrqtlvyjmnnyrskpqnyzmqqeabauue';

select * from tbl_index100 where d='eidrqtlvyjmnnyrskpqnyzmqqeabauue';

select * from tbl_index1000 where d='eidrqtlvyjmnnyrskpqnyzmqqeabauue';

select * from tbl_index5000 where d='eidrqtlvyjmnnyrskpqnyzmqqeabauue';

計數select "count"(*) from tbl_index*;

這裡的表名需要替換為相應的各個表

查詢1select * from tbl_index* where a=9999;

這裡由於a不是主鍵，所以需要全表掃瞄，所以查詢時間與a的值無關

查詢2select * from tbl_index* where b='2019-06-05 15:46:56';

隨機乙個時間

查詢3select * from tbl_index* where c='fkxxejjyrqsjkvtt';

隨機16位字串

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