达梦数据库参数优化

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mb5fed701509fd9 2021-09-08 15:36:00

达梦数据库初始化成功或集群搭建成功之后，调整实例参数可以避免很多使用问题，执行成功需重启数据库才能生效

如下两报错

PK_WITH_CLUSTER和MAX_SESSIONS值没有修改

达梦数据库参数优化_初始化

达梦数据库参数优化_其他_02

declare
mem_per int:=100; --默认所有的内存归达梦数据库使用，如实际不能100%可用，可以调整此参数
v_mem_mb int;
v_cpus int;
tname varchar(100);
MEMORY_POOL int;
MEMORY_N_POOLS int;
MEMORY_TARGET int;
BUFFER INT;
MAX_BUFFER INT;
RECYCLE int;
CACHE_POOL_SIZE int;
BUFFER_POOLS int;
RECYCLE_POOLS int;
SORT_BUF_SIZE int;
SORT_BUF_GLOBAL_SIZE INT;
DICT_BUF_SIZE INT;
SESS_POOL_SIZE INT;
HJ_BUF_SIZE INT;
HAGR_BUF_SIZE INT;
HJ_BUF_GLOBAL_SIZE INT;
HAGR_BUF_GLOBAL_SIZE INT;
SORT_FLAG INT;
SORT_BLK_SIZE INT;
RLOG_POOL_SIZE INT;
TASK_THREADS INT;
IO_THR_GROUPS INT;
CNT INT;

begin
CNT :=0;
SELECT TOP 1 N_CPU,TOTAL_PHY_SIZE/1024/1024 INTO v_cpus,v_mem_mb FROM V$SYSTEMINFO;
print v_cpus;
print v_mem_mb;
v_mem_mb := v_mem_mb * (mem_per/100.0);
v_mem_mb=round(v_mem_mb,-3);
print v_mem_mb;
IF v_mem_mb <= 2000 THEN
return;
END IF;
IF v_mem_mb > 512000 THEN
v_mem_mb :=v_mem_mb*0.8;
END IF;
MEMORY_TARGET=round(cast(v_mem_mb * 0.12 as int),-3);
TASK_THREADS :=4;
IO_THR_GROUPS :=4;
IF v_cpus < 8 THEN
TASK_THREADS :=4;
IO_THR_GROUPS :=2;
END IF;
IF v_cpus >= 64 THEN
v_cpus := 64;
TASK_THREADS :=16;
IO_THR_GROUPS :=8;
END IF;
BUFFER := round(cast(v_mem_mb * 0.4 as int),-3);
MAX_BUFFER := BUFFER;
RECYCLE :=cast(v_mem_mb * 0.04 as int);
IF v_mem_mb < 70000 THEN
with t as
(
select rownum rn from dual connect by level <= 100
) ,
t1 as
(
select * from t where rn > 1 minus
select
ta.rn * tb.rn
from
t ta,
t tb
where
ta.rn <= tb.rn
and ta.rn > 1
and tb.rn > 1
)
select top 1 rn into BUFFER_POOLS from t1 where rn > v_mem_mb/800 order by 1;
PRINT 'BUFFER_POOLS ' || BUFFER_POOLS;
--设置根据内存情况RECYCLE_POOLS参数
with t as
(
select rownum rn from dual connect by level <= 100
) ,
t1 as
(
select * from t where rn > 1 minus
select
ta.rn * tb.rn
from
t ta,
t tb
where
ta.rn <= tb.rn
and ta.rn > 1
and tb.rn > 1
)
select top 1 rn into RECYCLE_POOLS from t1 where rn > v_mem_mb/800/3 order by 1;
PRINT 'RECYCLE_POOLS ' || RECYCLE_POOLS;
ELSE
BUFFER_POOLS := 101;
RECYCLE_POOLS := 41;
END IF;

--修改内存池
IF v_mem_mb >= 16000 THEN
IF v_mem_mb= 16000 THEN
MEMORY_POOL := 1500;
SORT_BUF_GLOBAL_SIZE := 1000;
ELSE
MEMORY_POOL := 2000;
SORT_BUF_GLOBAL_SIZE := 2000;
END IF;
CACHE_POOL_SIZE := 1024;
SORT_FLAG = 0;
SORT_BLK_SIZE=1;
SORT_BUF_SIZE := 10;
SORT_BUF_GLOBAL_SIZE := 2000;
SESS_POOL_SIZE := 16;
RLOG_POOL_SIZE := 1024;
HJ_BUF_GLOBAL_SIZE := LEAST(cast(v_mem_mb * 0.0625 as int),10000);
HAGR_BUF_GLOBAL_SIZE := LEAST(cast(v_mem_mb * 0.0625 as int),10000);
HJ_BUF_SIZE :=250;
HAGR_BUF_SIZE :=250;
RECYCLE :=round(RECYCLE,-3);
IF v_mem_mb > 64000 THEN
CACHE_POOL_SIZE := 2048;
RLOG_POOL_SIZE := 2048;
SORT_FLAG = 1;
SORT_BLK_SIZE=1;
SORT_BUF_SIZE=50;
SORT_BUF_GLOBAL_SIZE= cast(v_mem_mb * 0.02 as int);
SESS_POOL_SIZE := 32;
HJ_BUF_GLOBAL_SIZE := cast(v_mem_mb * 0.15625 as int);
HAGR_BUF_GLOBAL_SIZE := cast(v_mem_mb * 0.04 as int);
HJ_BUF_SIZE :=512;
HAGR_BUF_SIZE :=512;
END IF;
DICT_BUF_SIZE := 50;
HJ_BUF_GLOBAL_SIZE :=round(HJ_BUF_GLOBAL_SIZE,-3);
HAGR_BUF_GLOBAL_SIZE :=round(HAGR_BUF_GLOBAL_SIZE,-3);
SORT_BUF_GLOBAL_SIZE :=round(SORT_BUF_GLOBAL_SIZE,-3);
RECYCLE :=round(RECYCLE,-3);
ELSE
MEMORY_POOL :=GREAT(cast(v_mem_mb * 0.0625 as int),100);
CACHE_POOL_SIZE := 200;
RLOG_POOL_SIZE := 256;
SORT_BUF_SIZE := 10;
SORT_BUF_GLOBAL_SIZE := 500;
DICT_BUF_SIZE := 50;
SESS_POOL_SIZE =16;
SORT_FLAG = 0;
SORT_BLK_SIZE=1;
HJ_BUF_GLOBAL_SIZE := GREAT(cast(v_mem_mb * 0.0625 as int),500);
HAGR_BUF_GLOBAL_SIZE := GREAT(cast(v_mem_mb * 0.0625 as int),500);
HJ_BUF_SIZE := GREAT(cast(v_mem_mb * 0.00625 as int),50);
HAGR_BUF_SIZE :=GREAT(cast(v_mem_mb * 0.00625 as int),50);
END IF;
tname :='BAK_DMINI_' || to_char(sysdate,'yymmdd');
execute IMMEDIATE 'select count(*) from USER_ALL_TABLES where table_name= ?' into CNT using tname;
IF exists(select 1 from v$instance where MODE$ in('NORMAL','PRIMARY')) THEN
IF CNT=0 THEN
execute IMMEDIATE 'CREATE TABLE BAK_DMINI_' || to_char(sysdate,'yymmdd') || ' as select *,sysdate uptime from v$dm_ini';
ELSE
execute IMMEDIATE 'INSERT INTO BAK_DMINI_' || to_char(sysdate,'yymmdd') || ' select *,sysdate uptime from v$dm_ini';
END IF;
END IF;
MEMORY_N_POOLS :=MEMORY_POOL/200;
print 'MEMORY_N_POOLS ' || MEMORY_N_POOLS;

--修改cpu相关参数
SP_SET_PARA_VALUE(2,'WORKER_THREADS',v_cpus);
SP_SET_PARA_VALUE(2,'TASK_THREADS',TASK_THREADS);
SP_SET_PARA_VALUE(2,'IO_THR_GROUPS',IO_THR_GROUPS);

--修改内存池相关参数
SP_SET_PARA_VALUE(2,'MAX_OS_MEMORY', mem_per);
SP_SET_PARA_VALUE(2,'MEMORY_POOL', MEMORY_POOL);
SP_SET_PARA_VALUE(2,'MEMORY_TARGET', MEMORY_TARGET);
if exists(select 1 from v$dm_ini where para_name='MEMORY_N_POOLS') then
SP_SET_PARA_VALUE(2,'MEMORY_N_POOLS', MEMORY_N_POOLS);
end if;

--修改缓冲区相关参数
SP_SET_PARA_VALUE(2,'BUFFER', BUFFER);
SP_SET_PARA_VALUE(2,'MAX_BUFFER', MAX_BUFFER);
SP_SET_PARA_VALUE(2,'BUFFER_POOLS', BUFFER_POOLS);
SP_SET_PARA_VALUE(2,'RECYCLE', RECYCLE);
SP_SET_PARA_VALUE(2,'RECYCLE_POOLS', RECYCLE_POOLS);

--修改HASH相关参数
SP_SET_PARA_VALUE(1,'HJ_BUF_GLOBAL_SIZE', HJ_BUF_GLOBAL_SIZE);
SP_SET_PARA_VALUE(1,'HJ_BUF_SIZE', HJ_BUF_SIZE );
SP_SET_PARA_VALUE(1,'HAGR_BUF_GLOBAL_SIZE',HAGR_BUF_GLOBAL_SIZE);
SP_SET_PARA_VALUE(1,'HAGR_BUF_SIZE', HAGR_BUF_SIZE );

--修改排序相关参数
SP_SET_PARA_VALUE(2,'SORT_FLAG',SORT_FLAG);
SP_SET_PARA_VALUE(2,'SORT_BLK_SIZE',SORT_BLK_SIZE);
SP_SET_PARA_VALUE(2,'SORT_BUF_SIZE', SORT_BUF_SIZE);
SP_SET_PARA_VALUE(2,'SORT_BUF_GLOBAL_SIZE', SORT_BUF_GLOBAL_SIZE);

--修改其他内存参数
SP_SET_PARA_VALUE(2,'RLOG_POOL_SIZE', RLOG_POOL_SIZE);
SP_SET_PARA_VALUE(2,'SESS_POOL_SIZE', SESS_POOL_SIZE);
SP_SET_PARA_VALUE(2,'CACHE_POOL_SIZE', CACHE_POOL_SIZE);
SP_SET_PARA_VALUE(2,'DICT_BUF_SIZE', DICT_BUF_SIZE);
SP_SET_PARA_VALUE(2,'VM_POOL_TARGET', 16384);
SP_SET_PARA_VALUE(2,'SESS_POOL_TARGET', 16384);

--修改实例相关参数
SP_SET_PARA_VALUE(2,'USE_PLN_POOL', 1);
SP_SET_PARA_VALUE(2,'ENABLE_MONITOR', 1);
SP_SET_PARA_VALUE(2,'SVR_LOG', 0);
SP_SET_PARA_VALUE(2,'TEMP_SIZE', 1024);
SP_SET_PARA_VALUE(2,'TEMP_SPACE_LIMIT', 102400);
SP_SET_PARA_VALUE(2,'MAX_SESSIONS', 1500);
SP_SET_PARA_VALUE(2,'MAX_SESSION_STATEMENT', 20000);
SP_SET_PARA_VALUE(2,'PK_WITH_CLUSTER', 0);
SP_SET_PARA_VALUE(2,'ENABLE_ENCRYPT',0);

--修改优化器相关参数
SP_SET_PARA_VALUE(2,'OLAP_FLAG',2);
SP_SET_PARA_VALUE(2,'VIEW_PULLUP_FLAG',1);
SP_SET_PARA_VALUE(2,'OPTIMIZER_MODE',1);
SP_SET_PARA_VALUE(2,'ADAPTIVE_NPLN_FLAG',0);

end;
/