个人经验总结：Sybase数据库性能优化

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