错误现象：小机除了能ping通，其它一切服务停止，控制台上看到灰屏，对一个键盘操作无反应
处理一：重启小机，操作系统正常。启动DB2，操作系统正常，连接某个数据库，系统内存消耗快速增涨，最后虚拟内存也耗尽，几分钟后同样故障又发生了。
处理二：再次重启，操作系统正常。启动DB2，操作系统正常，db2 get db cfg for eps_wz
显示数据库参数如下：
Database Configuration for Database eps_wz
Database configuration release level = 0x0b00
Database release level = 0x0b00
Database territory = CN
Database code page = 1386
Database code set = GBK
Database country/region code = 86
Database collating sequence = UNIQUE
Alternate collating sequence (ALT_COLLATE) =
Database page size = 4096
Dynamic SQL Query management (DYN_QUERY_MGMT) = DISABLE
Discovery support for this database (DISCOVER_DB) = ENABLE
Restrict access = NO
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
Default maintained table types for opt (DFT_MTTB_TYPES) = SYSTEM
Number of frequent values retained (NUM_FREQVALUES) = 10
Number of quantiles retained (NUM_QUANTILES) = 20
Backup pending = NO
Database is consistent = YES
Rollforward pending = NO
Restore pending = NO
Multi-page file allocation enabled = YES
Log retain for recovery status = NO
User exit for logging status = NO
Self tuning memory (SELF_TUNING_MEM) = ON
Size of database shared memory (4KB) (DATABASE_MEMORY) = AUTOMATIC
Database memory threshold (DB_MEM_THRESH) = 10
Max storage for lock list (4KB) (LOCKLIST) = AUTOMATIC
Percent. of lock lists per application (MAXLOCKS) = AUTOMATIC
Package cache size (4KB) (PCKCACHESZ) = AUTOMATIC
Sort heap thres for shared sorts (4KB) (SHEAPTHRES_SHR) = AUTOMATIC
Sort list heap (4KB) (SORTHEAP) = AUTOMATIC
2011-5-6 14:35:32 山民(75005963)
Database heap (4KB) (DBHEAP) = 4722
Catalog cache size (4KB) (CATALOGCACHE_SZ) = 790
Log buffer size (4KB) (LOGBUFSZ) = 100
Utilities heap size (4KB) (UTIL_HEAP_SZ) = 310893
Buffer pool size (pages) (BUFFPAGE) = 800000
Max size of appl. group mem set (4KB) (APPGROUP_MEM_SZ) = 30000
Percent of mem for appl. group heap (GROUPHEAP_RATIO) = 70
Max appl. control heap size (4KB) (APP_CTL_HEAP_SZ) = 8192
SQL statement heap (4KB) (STMTHEAP) = 4096
Default application heap (4KB) (APPLHEAPSZ) = 1024
Statistics heap size (4KB) (STAT_HEAP_SZ) = 4384
Interval for checking deadlock (ms) (DLCHKTIME) = 10000
Lock timeout (sec) (LOCKTIMEOUT) = -1
Changed pages threshold (CHNGPGS_THRESH) = 80
Number of asynchronous page cleaners (NUM_IOCLEANERS) = AUTOMATIC
Number of I/O servers (NUM_IOSERVERS) = AUTOMATIC
Index sort flag (INDEXSORT) = YES
Sequential detect flag (SEQDETECT) = YES
Default prefetch size (pages) (DFT_PREFETCH_SZ) = AUTOMATIC
Track modified pages (TRACKMOD) = OFF
Default number of containers = 1
Default tablespace extentsize (pages) (DFT_EXTENT_SZ) = 32
Max number of active applications (MAXAPPLS) = AUTOMATIC
Average number of active applications (AVG_APPLS) = AUTOMATIC
Max DB files open per application (MAXFILOP) = 64
Log file size (4KB) (LOGFILSIZ) = 1024
Number of primary log files (LOGPRIMARY) = 23
Number of secondary log files (LOGSECOND) = 6
Changed path to log files (NEWLOGPATH) =
Path to log files = /wzdb2data/epswzdb2/e
pswzdb2/NODE0000/SQL00001/SQLOGDIR/
Overflow log path (OVERFLOWLOGPATH) =
Mirror log path (MIRRORLOGPATH) =
First active log file =
Block log on disk full (BLK_LOG_DSK_FUL) = NO
Percent max primary log space by transaction (MAX_LOG) = 0
Num. of active log files for 1 active UOW(NUM_LOG_SPAN) = 0
Group commit count (MINCOMMIT) = 1
Percent log file reclaimed before soft chckpt (SOFTMAX) = 920
Log retain for recovery enabled (LOGRETAIN) = OFF
User exit for logging enabled (USEREXIT) = OFF
HADR database role = STANDARD
HADR local host name (HADR_LOCAL_HOST) =
HADR local service name (HADR_LOCAL_SVC) =
HADR remote host name (HADR_REMOTE_HOST) =
HADR remote service name (HADR_REMOTE_SVC) =
HADR instance name of remote server (HADR_REMOTE_INST) =
HADR timeout value (HADR_TIMEOUT) = 120
HADR log write synchronization mode (HADR_SYNCMODE) = NEARSYNC
2011-5-6 14:35:45 山民(75005963)
First log archive method (LOGARCHMETH1) = OFF
Options for logarchmeth1 (LOGARCHOPT1) =
Second log archive method (LOGARCHMETH2) = OFF
Options for logarchmeth2 (LOGARCHOPT2) =
Failover log archive path (FAILARCHPATH) =
Number of log archive retries on error (NUMARCHRETRY) = 5
Log archive retry Delay (secs) (ARCHRETRYDELAY) = 20
Vendor options (VENDOROPT) =
Auto restart enabled (AUTORESTART) = ON
Index re-creation time and redo index build (INDEXREC) = SYSTEM (RESTART)
Log pages during index build (LOGINDEXBUILD) = OFF
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) =
Automatic maintenance (AUTO_MAINT) = ON
Automatic database backup (AUTO_DB_BACKUP) = OFF
Automatic table maintenance (AUTO_TBL_MAINT) = ON
Automatic runstats (AUTO_RUNSTATS) = ON
Automatic statistics profiling (AUTO_STATS_PROF) = OFF
Automatic profile updates (AUTO_PROF_UPD) = OFF
Automatic reorganization (AUTO_REORG) = ON
想连上去修改数据库参数，结果系统又挂了。。。。。
再次重启。。。。。( db2pd -db eps_wz -memsets -bufferpools)抓数据
然后再启动DB2，然后
db2set db2_override_bpf=5000
db2 terminate
db2stop
db2start
$ ulimit -a
time(seconds) 无限制
file(blocks) 无限制
data(kbytes) 无限制
stack(kbytes) 32768
memory(kbytes) 无限制
coredump(blocks) 无限制
nofiles(descriptors) 2000
$
db2 connect to eps_wz
总算连上了。。。。。。。。
db2set db2_override_bpf=5000 这条语句是啥意思？？？
就是限制他使用内存
然后修改如下两条配置(都减掉一个0)
Utilities heap size (4KB) (UTIL_HEAP_SZ) = 310893
Buffer pool size (pages) (BUFFPAGE) = 800000
db2 update db cfg for eps_wz using UTIL_HEAP_SZ 31089
db2 update db cfg for eps_wz using BUFFPAGE 80000
db2 update db eps_wz using BUFFPAGE 10240
db2 update db eps_wz using UTIL_HEAP_SZ 8192
最后再使用
db2set DB2_OVERRIDE_BPF=
去掉对使用内存的限制,任务完成
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