[精华] 数据库性能的优化
后台是IBM RS60006E1 小型机(内存512M, cpu power 375).不知道以下的哪些参数还需要怎么样的优化？（最好能解释一下原因）
谢谢！
下面是配置参数
//*****************************************
Database configuration release level = 0x0900
Database release level = 0x0900
Database territory = CN
Database code page = 1252
Database code set = IBM-1252
Database country code = 86
Dynamic SQL Query management (DYN_QUERY_MGMT) = DISABLE
Directory object name (DIR_OBJ_NAME) =
Discovery support for this database (DISCOVER_DB) = ENABLE
Default query optimization class (DFT_QUERYOPT) = 5
Degree of parallelism (DFT_DEGREE) = 1
Continue upon arithmetic exceptions (DFT_SQLMATHWARN) = NO
Default refresh age (DFT_REFRESH_AGE) = 0
Number of frequent values retained (NUM_FREQVALUES) = 10
Number of quantiles retained (NUM_QUANTILES) = 20
Backup pending = NO
Database is consistent = NO
Rollforward pending = NO
Restore pending = NO
Multi-page file allocation enabled = NO
Log retain for recovery status = NO
User exit for logging status = NO
Data Links Token Expiry Interval (sec) (DL_EXPINT) = 60
Data Links Number of Copies (DL_NUM_COPIES) = 1
Data Links Time after Drop (days) (DL_TIME_DROP) = 1
Data Links Token in Uppercase (DL_UPPER) = NO
Data Links Token Algorithm (DL_TOKEN) = MAC0
Database heap (4KB) (DBHEAP) = 20000
Catalog cache size (4KB) (CATALOGCACHE_SZ) = 256
Log buffer size (4KB) (LOGBUFSZ) = 2048
Utilities heap size (4KB) (UTIL_HEAP_SZ) = 10000
Buffer pool size (pages) (BUFFPAGE) = 64000
Extended storage segments size (4KB) (ESTORE_SEG_SZ) = 16000
Number of extended storage segments (NUM_ESTORE_SEGS) = 0
Max storage for lock list (4KB) (LOCKLIST) = 20000
Max appl. control heap size (4KB) (APP_CTL_HEAP_SZ) = 512
Sort list heap (4KB) (SORTHEAP) = 20000
SQL statement heap (4KB) (STMTHEAP) = 20480
Default application heap (4KB) (APPLHEAPSZ) = 256
Package cache size (4KB) (PCKCACHESZ) = (MAXAPPLS*8)
Statistics heap size (4KB) (STAT_HEAP_SZ) = 4384
Interval for checking deadlock (ms) (DLCHKTIME) = 10000
Percent. of lock lists per application (MAXLOCKS) = 10
Lock timeout (sec) (LOCKTIMEOUT) = -1
Changed pages threshold (CHNGPGS_THRESH) = 60
Number of asynchronous page cleaners (NUM_IOCLEANERS) = 1
Number of I/O servers (NUM_IOSERVERS) = 3
Index sort flag (INDEXSORT) = YES
Sequential detect flag (SEQDETECT) = YES
Default prefetch size (pages) (DFT_PREFETCH_SZ) = 320
Default number of containers = 1
Default tablespace extentsize (pages) (DFT_EXTENT_SZ) = 32
Max number of active applications (MAXAPPLS) = 200
Average number of active applications (AVG_APPLS) = 1
Max DB files open per application (MAXFILOP) = 64
Log file size (4KB) (LOGFILSIZ) = 40000
Number of primary log files (LOGPRIMARY) = 3
Number of secondary log files (LOGSECOND) = 2
Changed path to log files (NEWLOGPATH) =
Path to log files =
/dbdir/db2inst1/NODE0
000/SQL00001/SQLOGDIR/
First active log file =
Group commit count (MINCOMMIT) = 1
Percent log file reclaimed before soft chckpt (SOFTMAX) = 100
Log retain for recovery enabled (LOGRETAIN) = OFF
User exit for logging enabled (USEREXIT) = OFF
Auto restart enabled (AUTORESTART) = ON
Index re-creation time (INDEXREC) = SYSTEM
(RESTART)
Default number of loadrec sessions (DFT_LOADREC_SES) = 1
Number of database backups to retain (NUM_DB_BACKUPS) = 12
Recovery history retention (days) (REC_HIS_RETENTN) = 366
TSM management class (TSM_MGMTCLASS) =
TSM node name (TSM_NODENAME) =
TSM owner (TSM_OWNER) =
TSM password (TSM_PASSWORD) =
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