一次数据库的简单性能优化:
增加INDEX表空间,增大在线归档日志组文件,增大在物理内存允许范围内sag_target,增大log_buffer
=========================================================
1、建立专用Index表空间
CREATE TABLESPACE INDX DATAFILE
'/home/oracle/oracle/product/10.2.0/oradata/gdimp/INDEX.dbf' SIZE 5120M AUTOEXTEND OFF
LOGGING
ONLINE
PERMANENT
EXTENT MANAGEMENT LOCAL AUTOALLOCATE
BLOCKSIZE 8K
SEGMENT SPACE MANAGEMENT AUTO
2、生成控制文件的.trc并获取其中的内容
alter database backup controlfile to trace;
* GROUP 1 '/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo01.log' SIZE 50M,
* GROUP 2 '/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo02.log' SIZE 50M,
* GROUP 3 '/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo03.log' SIZE 50M
3、增加替换日志组文件
alter database add logfile group 4 ('/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo04.log') size 50M;
alter database add logfile group 5 ('/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo05.log') size 50M;
4、检查log日志组的状态
select * from v$log;
5、调整日志组的status 为inactive,并drop掉要增大日志组
alter system switch logfile;
alter database drop logfile group 1;
alter database drop logfile group 2;
alter database drop logfile group 3;
6、操作系统下删除原日志组1、2、3中的文件
rm /home/oracle/oracle/product/10.2.0/oradata/gdimp/redo01.log
rm /home/oracle/oracle/product/10.2.0/oradata/gdimp/redo02.log
rm /home/oracle/oracle/product/10.2.0/oradata/gdimp/redo03.log
7、重建日志组1、2、3
alter database add logfile group 1 ('/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo01.log') size 500M;
alter database add logfile group 2 ('/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo02.log') size 500M;
alter database add logfile group 3 ('/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo03.log') size 500M;
8、切换日志组
9、删除中间过渡用的日志组4、5
alter database drop logfile group 4;
alter database drop logfile group 5;
10、到操作系统下删除原日志组4、5中的文件
rm /home/oracle/oracle/product/10.2.0/oradata/gdimp/redo04.log
rm /home/oracle/oracle/product/10.2.0/oradata/gdimp/redo05.log
11、备份当前的最新的控制文件
SQL> connect internal
SQL> alter database backup controlfile to trace;
12、保存初始化参数并调整初始化参数sga_target,log_buffer
create pfile from spfile;
alter system set sga_target=1024M scope=spfile
alter system set log_buffer=20480K scope=spfile
13、对用户模式下进行统计
exec dbms_stats.gather_schema_stats(ownname => 'gdimp', options => 'GATHER AUTO', estimate_percent =>
dbms_stats.auto_sample_size,method_opt => 'for all columns size repeat', degree => 15 );
exec dbms_stats.gather_schema_stats(ownname => 'imp', options => 'GATHER AUTO', estimate_percent =>
14、错误处理1
ERROR at line 1:
ORA-01624: log 3 needed for crash recovery of instance gdimp (thread 1)
ORA-00312: online log 3 thread 1: '/home/oracle/oracle/product/10.2.0/oradata/gdimp/redo03.log'
删除在线日志组redo03时报错，连续的转化造成所有的日志组在很短
的时间内status状态都处active状态，故在删除时出现如上报错
14、错误处理2
SQL> alter system set log_buffer=20480k scope=spfile;
alter system set log_buffer=20480k scope=spfile
*
ORA-02095: specified initialization parameter cannot be modified
02095, 00000, "specified initialization parameter cannot be modified"
// *Cause: The specified initialization parameter is not modifiable
SQL> show parameter log_buffer;
NAME TYPE VALUE
------------------------------------ ----------- -----------
log_buffer integer 7053312
在修改这个参数时会出现如上错误，应该是没有问题的；
数据库重新启动后加载，相应的参数将会调整成功
log_buffer integer 20480000
15、show SGA =========================================================
User dump directory 516
VIRTUAL CIRCUITS 605180
POOL NAME BYTES
------------ -------------------------- ----------
shared pool Wait History 93800
Wait event pointers 168
X$KSFQP ANCHOR 52
X$KSVII table 256
X$KSVIS table 64
X$KSVIT table 256
XDB Schema Cac 4377016
active checkp 944
alert threshol 4116
alter system errs: kspnfy 108544
analytic workspace 2376
shared pool archive_lag_target 9620
block media rcv state obj 2764
block_sizes_array 24
bloom filter 3532
branch 96804
branch so 248
broker globals 112
buffer handles 282004
buffer_pool_desc_array 2700
buffers waiting for write 12
call 86120
shared pool change notification obj m 8200
change notification regis 8200
change tracking recovery 262144
change tracking state cha 4168
channel context areas 19712
channel handle 47992
channel sga anchor 172
character set memory 34900
character set object 674656
cinfo_kfnsg 4100
client/application info l 400
shared pool constraints 47752
cross-platform compliance 1908
database NCHAR language h 540
database creation languag 540
db_block_hash_buckets 2228224
db_files 196820
dbwr actual working sets 32
dbwr message active flag 4
dbwr outstanding ios per 64
dbwr suspend/resume array 8
dbwr suspend/resume ptr a 8
shared pool dbwr working sets kcbdbws 8
dbwriter coalesce bitmap 64
dbwriter coalesce buffer 1052672
dbwriter coalesce struct 32
dev2node map 2048
dgtab_kfmdsg 8964
dispatcher queue 168
dispatcher rate 1312
dispatcher service names 12
distributed_transactions- 11256
dlo fib struct 8020
shared pool done Q child latches 272
downed inst bit vector 36
dpslut_kfdsg 256
dsktab_kfgsg 45816
dummy 18756
enqueue 403364
enqueue resources 150516
enqueue_hash 16920
enqueue_hash_chain_latche 400
error message file name 64
event classes 128
shared pool event descriptor table 28064
event statistics per sess 2682680
event statistics ptr arra 1340
event-class map 3496
eventlist to post commits 468
fdhsh_kffsg 8196
fdrec_kffsg 12
file # to first dba, exte 2412
file # translation table 28840
fixed allocation callback 244
free memory 79940
shared pool generic process shared st 448
groups_kfgbsg 4096
grplut_kfgsg 256
grptab_kfgsg 3592
heap_kfsg 80
hot latch diagnostics 80
idtab_kfksg 40696
incr ckpt write count arr 168
instance cnxn information 12060
invalid low rba queue 640
java static objs 26468
shared pool joxs heap 4196
joxs struct 80
jsksncb: 2 7496
jsksncb: 3 4096
jsksncb: 4 4056
jsksncb: 6 2808
jsksncb: 7 483328
jsksncb: 8 800
jsksncb: 9 23752
kcbl seq io throughput 16000
kcbl state objects 7200
shared pool kcbl statistics 6144
kcrfa structures 10032
kcrrny 25320
kea advisor definition ca 480
kebm run-once actions 16
kebm slave descriptors 988
kebm slave message 124
kebm slave reply 44
kebm test replies 22528
kelr other metrics table 36
kelr system metrics table 248
shared pool kelt translation table 300
kewr MMON Remote Flush Re 23552
kfasga 1044
kfdsga 44
kffsga 48
kfgbsg 28
kfgsga 36
kfkhsh_kfdsg 2052
kfkid hash 2052
kfkid hrec 12
kfkrec_kfdsg 12
shared pool kfmdsg 72
kfmsg 3088
kga sga 4
kghx free lists 20736
kgl lock hash table state 15660
kgllk hash table 178176
kglsim count of pinned he 2832
kglsim free heap list 72
kglsim free obj list 72
kglsim hash table 4104
kglsim hash table bkts 2097152
shared pool kglsim heap 615296
kglsim main lru count 75520
kglsim main lru size 151040
kglsim object batch 1038096
kglsim pin list arr 288
kglsim recovery area 1320
kglsim sga 22188
kglsim size of pinned mem 5664
kgsk subheap descriptor 80
kkj jobq wor 4104
kkj jobq slav 896
shared pool kks sga 40
kks stats 28
kks stats hds 560
kks stats latch 400
kks stats mem 32
kks stbkt 917504
kksss 21504
kksss-heap 38628
kkzias 144
kmgsb circular statistics 108544
knlsg 80
shared pool knlu_txn_init_btree:init 28
knstsg 40
kodosgi kodos 16
kodosgi kopfdo 400
koh dur heap 188
kohsg 4
kolbsgi: KOLB's SGA initi 4
kolfsgi: KOLF's SGA initi 4
kponfy 672
kpscad: kpscscon 340
kpssnfy: kpsssgct 32
shared pool kpummst global in the SGA 992
kqlpWrntoStr:string 200
kqlpaac:value-1 280
krvxdka 588
krvxlctx 160
krvxmctx 20
ksb process so list 288
ksbtnfy: infrequent actio 1760
kscdnfyglobalflags 4
kscdnfyinitflags 4
kscdnfyinithead 12
shared pool kscdnfyinitnext 16
kscdnfyinitprev 16
ksfd shared pool recovery 16
ksfm state object 20
ksfv subheap descriptor 104
ksim client list 84
ksir State Object 3788
ksleid alloc 112
ksmd unit test 1 7576
kso req alloc 4116
kso req alloc heapds 152
shared pool kspd run-time context 12
kspload:comment 20
ksuloi: child latches for 400
ksuloi: garbage collectio 16
ksuloi: long op free list 32
ksuloi: long op statistic 142000
ksuloi: long op used list 32
ksunfy: is parent statist 3000
ksunfy: nodes of hierarch 320
ksunfy: system-global sta 3000
ksv reaper 4168
shared pool ksv slave class 8276
ksws RLB SGA ctx 20
ksws service events 32032
ksws service object 2640
ktlbk state objects 188416
kwqicaqe2kc1 8200
kwqmncal: allocate buffer 4088
kwqmncini-slv 240
kwqmncini-tbl 192
kwrsnfy: kwrs 1612
kxfpdp pointers 14400
shared pool kzekm heap descriptor 164
kzsrs filename 532
kzull 4960
kzulsg SGA 1040
kzulu 160
latch classes 352
latch descriptor table 1528
latch hashvalue table 1528
latch nowait fails or sle 113088
latch recovery alignment 48
latch recovery structures 468
shared pool latchnum to latch map 1528
lckhsh_kffsg 2052
lckhsr_kffsg 12
lcktab_kffsg 2764
library cache 11777948
list 3584
listener addresses 4
log file size history arr 168
log_checkpoint_timeout 12360
log_simultaneous_copies 992
max allowable # log files 253200
shared pool media recovery state obje 6044
memory transfer history 12804
message pool context area 6536
message pool freequeue 698460
messages 55200
modification 67616
monitoring co 8256
msg Q child latches 272
multiblock re 8240
mvobj part des 21368
name-service entry 3912
shared pool name-service request 2764
name-service table 12944
namhsh_kfdsg 2052
namhsh_kfgsg 144
namrec_kfdsg 12
network connections 52700
obj htab chun 387288
obj stat memo 236812
object level 28896
object level stat table 1008
object level stats hash t 256
shared pool object queue 294336
object queue hash buckets 139264
object queue hash table d 6080
object stat dummy elem 28
object stat dummy stat 288
os statistics 48
osp allocation 33444
osp pool handles 4
parallel_max_servers 8960
param hash values 5540
parameter blocks 5540
shared pool parameter handle 125328
parameter table block 465360
parameter text value 3404
parameter value memory 312
partitioning d 118848
plis struct 80
plugin datafile array 3612
plwda:PLW_STR_NEW_LEN_VEC 4
plwda:PLW_STR_NEW_RVAL 12
plwda:PLW_STR_NEW_VAL_VEC 4
plwpil:wa 4252
shared pool plwppwp:PLW_STR_NEW_LEN_V 16
plwppwp:PLW_STR_NEW_VAL_V 28
plwppwp:garbage handle 8
plwshs:temphdl 28
plwspv:PLW_STR_NEW_VAL 24
policy hash table descrpt 152
post stats 1076
post/wait queues 3712
primem_kfmdsg 516
prirec_kfmdsg 12
private strands 2396160
shared pool prmtzdini tz region 384988
process group array 24328
processes 1200
procs: ksunfy 438000
procs_kfgbsg 440
property service SO 3528
pso child tracebuf ptrs 1200
pso tbs: ksunfy 116400
pspool_kfsg 44
ptr to sessions under idl 16
qesmmaInitialize: 112
shared pool qesmmaInitialize: ia_qesm 264
qesmmaInitialize: oa_qesm 112
qesmmaInitialize: pa_qesm 11088
qesmmaInitialize: ta_qesm 264
qm_init_sga:oidctx 4
qm_init_sga:origroot 56
qm_init_sga:qmdpsg 28
qm_init_sga:rootname 4
qm_init_uga:qmsg 15064
qm_init_uga_helper: qmkm 16
qmcInitSGA:qmsga_acl_prop 32
shared pool qmn tasks 4128
qmps connections 65280
qmtb_init_data 856
qmuCreatePermSubHeap:subh 80
qtree_kwqbsgn 28
qtree_kwqbspse 28
quiesce system context 252
quiescing session 2252
recov_kgqbtctx 3036
redo allocation latch(es) 3800
replication session stats 93800
shared pool repository 174440
reservation state object 2516
reserved entries for all 3776
resize operation history 28804
resize request state obje 351200
resumable 3272
returns from metrics req 521216
returns from remote ops 43008
row cache 3741868
row cache child latch 3400
rules engine aggregate st 1412
shared pool rules engine context 200
sched job queue 3788
sched job slv 3912
segmented arrays 4336
service names array 28
sess Q child latches 272
session idle latches 400
sessions 1605324
set_descriptor_array 14400
sga dev dict 36
sga listelement 1024
shared pool sga node map 8
sim cache nbufs 640
sim cache sizes 640
sim kghx free lists 4
sim lru segments 1280
sim segment hits 2560
sim segment num bufs 1280
sim state object 24
sim trace buf 5140
sim trace buf context 120
sim_knlasg 1200
shared pool simulator hash buckets 131328
simulator hash latch 6400
simulator latch/bucket st 3328
slave class sga anchor 48
sort segment handle 2504
spfile callback table: ks 224
spfile cleanup structure 16752
sql area 134368520
sql area:PLSQL 206068
sskgplib 1132
stat hash values 1452
shared pool state objects 4200
subheap 53700
sys event stats 192280
sys event stats for Other 192280
system default language h 540
table definiti 1448
temp lob duration state o 3720
temporary foreign ref 3592
temporary tabl 4116
temporary table lock 2504
threshold ale 8212
shared pool time manager context 36
trace buf hdr xtend 68368
trace buffer 1474560
trace buffer header array 34184
trace events array 68000
trace_knlasg 500
transaction 494956
trigger condition node 64
trigger defini 9484
trigger inform 2860
txncallback 58740
shared pool type object de 214516
where to latch num map 7068
work area tab 276576
writes stopped lock conte 16
writes stopped lock state 20
x$ksmfs table 12
x$rule_set 16804
xdbconf 4
xscalc 3528
xslongops 4040
xsoqmehift 4168
shared pool xsoqojhift 3272
xsoqophift 4168
xsoqsehift 2376
xssinfo 5532
************ ----------
sum 249604556
buffer_cache 784334848
fixed_sga 1223488
log_buffer 7163904
sum 792722240
![【MySQL数据库】数据库索引事务1.索引2.事务[图]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)