Sybase数据库性能优化的具体过程

Sybase数据库性能优化的具体过程用一个实例讲解了Sybase数据库性能优化的具体过程，具体内容请参考下文： 共享锁 sp_getapplock 锁定应用程序资源 sp_releaseapplock 为应用程序资源解锁 SET LOCK_TIMEOUT 1800 锁超时期限设置 sp_configure deadlock checking period,5000 设置锁检测周期 sp_configure lock wait period,5000 设置锁的等待时间 sp_setrowlockpromote 设置基本个表的最大行锁升级数(锁数) sp_setrowlockpromote TABLE,TREECODE,500,500,100 sp_setrowlockpromote TABLE,LCD05,500,500,100 Lock Manager number of locks = 50000 #锁数 deadlock checking period = DEFAULT freelock transfer block size = DEFAULT max engine freelocks = DEFAULT lock spinlock ratio = DEFAULT lock hashtable size = DEFAULT lock scheme = DEFAULT lock wait period = DEFAULT read committed with lock = DEFAULT 当很多事务同时访问同一个数据库时，会加剧锁资源争夺，严重时事务之间会发生死锁。可用sp_object_stats查明死锁位置。该过程报告资源争夺最激烈的10张表、一个数据库中资源争夺的表和单个表的争夺情况。语法为sp_object_stats interval , top_n , dbname , objname , rpt_option ，查看锁争夺情况只需设置interval为“hh:mm:ss”。如果显示每种锁的争夺程度超过15%，应该改变加锁方式，比如表的全页锁改成数据页锁，数据页锁改成数据行锁等。 Parameter Name Default Memory Used Config Value Run Value - - - - - allow remote access 1 0 1 1 print recovery information 0 0 0 0 recovery interval in minutes 5 0 5 5 tape retention in days 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - global async prefetch limit 10 0 10 10 global cache partition number 1 0 1 1 memory alignment boundary 2048 0 2048 2048 number of index trips 0 0 0 0 number of oam trips 0 0 0 0 procedure cache percent 20 22426 20 20 total data cache size 0 89698 0 89698 total memory 47104 196608 98304 98304 Parameter Name Default Memory Used Config Value Run Value - - - - - cis bulk insert batch size 0 0 0 0 cis connect timeout 0 0 0 0 cis cursor rows 50 0 50 50 cis packet size 512 0 512 512 cis rpc handling 0 0 0 0 enable cis 1 0 1 1 max cis remote connections 0 0 0 0 max cis remote servers 25 19 25 25 Parameter Name Default Memory Used Config Value Run Value - - - - - dtm detach timeout period 0 0 0 0 dtm lock timeout period 300 0 300 300 enable xact coordination 1 0 1 1 number of dtx participants 500 149 500 500 strict dtm enforcement 0 0 0 0 txn to pss ratio 16 3692 16 16 xact coordination interval 60 0 60 60 Parameter Name Default Memory Used Config Value Run Value - - - - - average cap size 200 0 200 200 caps per ccb 50 0 50 50 dump on conditions 0 0 0 0 maximum dump conditions 10 0 10 10 number of ccbs 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - allow sql server async i/o 1 0 1 1 disable disk mirroring 0 0 0 0 disk i/o structures 256 31 256 256 number of devices 10 #5 10 10 page utilization percent 95 0 95 95 Parameter Name Default Memory Used Config Value Run Value - - - - - event log computer name LocalSystem 0 LocalSystem LocalSystem event logging 1 0 1 1 log audit logon failure 0 0 0 0 log audit logon success 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - esp execution priority 8 0 8 8 esp execution stacksize 77824 0 77824 77824 esp unload dll 0 0 0 0 start mail session 0 0 0 0 xp_cmdshell context 1 0 1 1 Parameter Name Default Memory Used Config Value Run Value - - - - - configuration file 0 0 0 /sybase/hgd Parameter Name Default Memory Used Config Value Run Value - - - - - enable java 0 0 0 0 size of global fixed heap 300 0 300 300 size of process object heap 300 0 300 300 size of shared class heap 3072 0 3072 3072 Parameter Name Default Memory Used Config Value Run Value - - - - - default character set id 1 0 1 1 default language id 0 0 0 0 default sortorder id 50 0 50 50 disable character set conversi 0 0 0 0 enable unicode conversions 0 0 1 1 number of languages in cache 3 4 3 3 size of unilib cache 0 140 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - deadlock checking period 500 0 500 500 freelock transfer block size 30 0 30 30 lock address spinlock ratio 100 0 100 100 lock hashtable size 2048 48 2048 2048 lock scheme allpages 0 allpages allpages lock spinlock ratio 85 0 85 85 lock table spinlock ratio 20 0 20 20 lock wait period 2147483647 0 2147483647 2147483647 max engine freelocks 10 0 10 10 number of locks 5000 2344 10000 10000 print deadlock information 0 0 1 1 read committed with lock 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - additional network memory 0 0 0 0 allow resource limits 0 0 0 0 audit queue size 100 42 100 100 average cap size 200 0 200 200 caps per ccb 50 0 50 50 deadlock pipe max messages 0 0 0 0 default network packet size 512 #505 512 512 disk i/o structures 256 31 256 256 enable rep agent threads 0 0 0 0 errorlog pipe max messages 0 0 0 0 event buffers per engine 100 #11 100 100 executable codesize + overhead 0 20261 0 20261 lock hashtable size 2048 48 2048 2048 lock spinlock ratio 85 0 85 85 max cis remote servers 25 19 25 25 max number network listeners 5 868 5 5 max online engines 1 216 1 1 max roles enabled per user 20 #22 20 20 memory per worker process 1024 0 1024 1024 number of alarms 40 3 40 40 number of aux scan descriptors 200 #258 200 200 number of ccbs 0 0 0 0 number of devices 10 #5 10 10 number of languages in cache 3 4 3 3 number of large i/o buffers 6 97 6 6 number of locks 5000 2344 10000 10000 number of mailboxes 30 1 30 30 number of messages 64 3 64 64 number of open databases 12 1239 12 12 number of open indexes 500 512 500 500 number of open objects 500 561 500 500 number of remote connections 20 86 50 50 number of remote logins 20 23 20 20 number of remote sites 10 1729 10 10 number of user connections 25 43141 250 250 number of worker processes 0 0 0 0 partition groups 1024 904 1024 1024 permission cache entries 15 #227 15 15 plan text pipe max messages 0 0 0 0 procedure cache percent 20 22426 20 20 process wait events 0 0 0 0 remote server pre-read packets 3 #83 3 3 size of global fixed heap 300 0 300 300 size of process object heap 300 0 300 300 size of shared class heap 3072 0 3072 3072 size of unilib cache 0 140 0 0 sql text pipe max messages 0 0 0 0 stack guard size 4096 #1108 4096 4096 stack size 86016 #23269 86016 86016 statement pipe max messages 0 0 0 0 total data cache size 0 89698 0 89698 total memory 47104 196608 98304 98304 txn to pss ratio 16 3692 16 16 wait event timing 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - number of open databases 12 1239 12 12 number of open indexes 500 512 500 500 number of open objects 500 561 500 500 open index hash spinlock ratio 100 0 100 100 open index spinlock ratio 100 0 100 100 open object spinlock ratio 100 0 100 100 Parameter Name Default Memory Used Config Value Run Value - - - - - Q diagnostics active 0 0 0 0 SQL batch capture 0 0 0 0 deadlock pipe active 0 0 0 0 deadlock pipe max messages 0 0 0 0 errorlog pipe active 0 0 0 0 errorlog pipe max messages 0 0 0 0 object lockwait timing 0 0 0 0 per object statistics active 0 0 0 0 plan text pipe active 0 0 0 0 plan text pipe max messages 0 0 0 0 process wait events 0 0 0 0 sql text pipe active 0 0 0 0 sql text pipe max messages 0 0 0 0 statement pipe active 0 0 0 0 statement pipe max messages 0 0 0 0 statement statistics active 0 0 0 0 wait event timing 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - additional network memory 0 0 0 0 allow remote access 1 0 1 1 allow sendmsg 0 0 0 0 default network packet size 512 #505 512 512 max network packet size 512 0 512 512 max number network listeners 5 868 5 5 number of remote connections 20 86 50 50 number of remote logins 20 23 20 20 number of remote sites 10 1729 10 10 remote server pre-read packets 3 #83 3 3 syb_sendmsg port number 0 0 0 0 tcp no delay 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - max async i/os per engine 2147483647 0 2147483647 2147483647 max async i/os per server 2147483647 0 2147483647 2147483647 o/s file descriptors 0 0 0 1024 tcp no delay 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - max parallel degree 1 0 1 1 max scan parallel degree 1 0 1 1 memory per worker process 1024 0 1024 1024 number of worker processes 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - additional network memory 0 0 0 0 lock shared memory 0 0 0 0 max SQL text monitored 0 7 0 0 shared memory starting address 0 0 0 0 total memory 47104 196608 98304 98304 Parameter Name Default Memory Used Config Value Run Value - - - - - max online engines 1 216 1 1 min online engines 1 0 1 1 Parameter Name Default Memory Used Config Value Run Value - - - - - enable rep agent threads 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - SQL Perfmon Integration 1 0 1 1 abstract plan cache 0 0 0 0 abstract plan dump 0 0 0 0 abstract plan load 0 0 0 0 abstract plan replace 0 0 0 0 allow backward scans 1 0 1 1 allow nested triggers 1 0 1 1 allow resource limits 0 0 0 0 allow updates to system tables 0 0 1 1 audit queue size 100 42 100 100 cpu accounting flush interval 200 0 200 200 cpu grace time 500 0 500 500 deadlock retries 5 0 5 5 default database size 2 0 2 2 default exp_row_size percent 5 0 5 5 default fill factor percent 0 0 0 0 enable DTM 0 0 0 0 enable HA 0 0 0 0 enable housekeeper GC 1 0 1 1 enable sort-merge join and JTC 0 0 0 0 event buffers per engine 100 #11 100 100 housekeeper free write percent 1 0 1 1 i/o accounting flush interval 1000 0 1000 1000 i/o polling process count 10 0 10 10 identity burning set factor 5000 0 5000 5000 identity grab size 1 0 1 1 license information 25 0 25 25 number of alarms 40 3 40 40 number of aux scan descriptors 200 #258 200 200 number of large i/o buffers 6 97 6 6 number of mailboxes 30 1 30 30 number of messages 64 3 64 64 number of open databases 12 1239 12 12 number of open indexes 500 512 500 500 number of open objects 500 561 500 500 number of pre-allocated extent 2 0 2 2 number of sort buffers 500 0 500 500 page lock promotion HWM 200 0 200 200 page lock promotion LWM 200 0 200 200 page lock promotion PCT 100 0 100 100 partition groups 1024 904 1024 1024 partition spinlock ratio 10 0 10 10 print deadlock information 0 0 1 1 row lock promotion HWM 200 0 200 200 row lock promotion LWM 200 0 200 200 row lock promotion PCT 100 0 100 100 runnable process search count 2000 0 2000 2000 size of auto identity column 10 0 10 10 sql server clock tick length 100000 0 100000 100000 text prefetch size 16 0 16 16 time slice 100 0 100 100 upgrade version 1100 0 12000 12000 Parameter Name Default Memory Used Config Value Run Value - - - - - allow procedure grouping 1 0 1 1 auditing 0 0 0 0 check password for digit 0 0 0 0 curread change w/ open cursors 1 0 1 1 current audit table 1 0 1 1 max roles enabled per user 20 #22 20 20 maximum failed logins 0 0 0 0 minimum password length 6 0 6 6 msg confidentiality reqd 0 0 0 0 msg integrity reqd 0 0 0 0 secure default login guest 0 guest guest select on syscomments.text 1 0 1 1 suspend audit when device full 1 0 1 1 unified login required 0 0 0 0 use security services 0 0 0 0 Parameter Name Default Memory Used Config Value Run Value - - - - - default network packet size 512 #505 512 512 number of pre-allocated extent 2 0 2 2 number of user connections 25 43141 250 250 permission cache entries 15 #227 15 15 stack guard size 4096 #1108 4096 4096 stack size 86016 #23269 86016 86016 systemwide password expiration 0 0 0 0 user log cache size 2048 0 2048 2048 user log cache spinlock ratio 20 0 20 20-