sybase.cfg求调优
sybase最近很慢很慢，感觉硬件应该不是瓶颈，怀疑sybase.cfg有不合理的地方。服务器配置：6cpu，12G内存，帮忙看看下面的配置合理不，那些需要调优?谢谢各位！
##############################################################################
#
# Configuration File for the Sybase SQL Server
#
# Please read the System Administration Guide (SAG)
# before changing any of the values in this file.
#
##############################################################################
recovery interval in minutes = DEFAULT
print recovery information = DEFAULT
tape retention in days = DEFAULT
number of oam trips = DEFAULT
number of index trips = DEFAULT
memory alignment boundary = DEFAULT
global async prefetch limit = 15
global cache partition number = DEFAULT
cache size = 1900m
cache status = default data cache
cache replacement policy = DEFAULT
local cache partition number = DEFAULT
number of open databases = DEFAULT
number of open objects = 5120
open object spinlock ratio = DEFAULT
number of open indexes = 5120
open index hash spinlock ratio = DEFAULT
open index spinlock ratio = DEFAULT
partition groups = DEFAULT
partition spinlock ratio = DEFAULT
disk i/o structures = DEFAULT
number of large i/o buffers = DEFAULT
page utilization percent = 85
number of devices = 30
disable disk mirroring = DEFAULT
allow sql server async i/o = DEFAULT
disable character set conversions = DEFAULT
enable unicode normalization = DEFAULT
enable surrogate processing = DEFAULT
enable unicode conversions = DEFAULT
size of unilib cache = DEFAULT
default network packet size = 1536
max network packet size = 5120
remote server pre-read packets = DEFAULT
number of remote connections = 64
number of remote logins = DEFAULT
number of remote sites = DEFAULT
max number network listeners = 64
tcp no delay = DEFAULT
allow sendmsg = DEFAULT
syb_sendmsg port number = DEFAULT
allow remote access = DEFAULT
max async i/os per engine = DEFAULT
max async i/os per server = DEFAULT
number of worker processes = 5
memory per worker process = 2048
max parallel degree = 2
max scan parallel degree = DEFAULT
max memory = 4000000
additional network memory = DEFAULT
shared memory starting address = DEFAULT
allocate max shared memory = 1
dynamic allocation on demand = DEFAULT
lock shared memory = DEFAULT
heap memory per user = DEFAULT
max online engines = 6
number of engines at startup = 6
procedure cache size = 204800
default database size = 10000
identity burning set factor = DEFAULT
allow nested triggers = DEFAULT
allow updates to system tables = 1
default fill factor percent = DEFAULT
default exp_row_size percent = DEFAULT
number of mailboxes = DEFAULT
number of messages = DEFAULT
number of alarms = DEFAULT
number of pre-allocated extents = DEFAULT
event buffers per engine = DEFAULT
cpu accounting flush interval = DEFAULT
i/o accounting flush interval = DEFAULT
sql server clock tick length = DEFAULT
runnable process search count = DEFAULT
i/o polling process count = DEFAULT
time slice = DEFAULT
cpu grace time = DEFAULT
number of sort buffers = DEFAULT
size of auto identity column = DEFAULT
identity grab size = DEFAULT
housekeeper free write percent = DEFAULT
enable housekeeper GC = DEFAULT
allow resource limits = DEFAULT
number of aux scan descriptors = DEFAULT
SQL Perfmon Integration = DEFAULT
allow backward scans = DEFAULT
license information = DEFAULT
enable sort-merge join and JTC = DEFAULT
abstract plan load = DEFAULT
abstract plan dump = DEFAULT
abstract plan replace = DEFAULT
abstract plan cache = DEFAULT
text prefetch size = DEFAULT
enable HA = DEFAULT
number of histogram steps = DEFAULT
sampling percent = DEFAULT
number of user connections = 150
stack size = DEFAULT
stack guard size = DEFAULT
permission cache entries = DEFAULT
user log cache size = DEFAULT
user log cache spinlock ratio = DEFAULT
number of locks = 100000
deadlock checking period = 5000
lock spinlock ratio = DEFAULT
lock address spinlock ratio = DEFAULT
lock table spinlock ratio = DEFAULT
lock hashtable size = DEFAULT
lock scheme = datapages
lock wait period = DEFAULT
read committed with lock = DEFAULT
print deadlock information = 1
deadlock retries = 2
page lock promotion HWM = DEFAULT
page lock promotion LWM = DEFAULT
page lock promotion PCT = DEFAULT
row lock promotion HWM = DEFAULT
row lock promotion LWM = DEFAULT
row lock promotion PCT = DEFAULT
systemwide password expiration = DEFAULT
audit queue size = DEFAULT
curread change w/ open cursors = DEFAULT
allow procedure grouping = DEFAULT
select on syscomments.text = DEFAULT
auditing = DEFAULT
current audit table = DEFAULT
suspend audit when device full = DEFAULT
enable row level access = DEFAULT
check password for digit = DEFAULT
minimum password length = DEFAULT
maximum failed logins = DEFAULT
enable ssl = DEFAULT
unified login required = DEFAULT
use security services = DEFAULT
msg confidentiality reqd = DEFAULT
msg integrity reqd = DEFAULT
secure default login = DEFAULT
esp unload dll = DEFAULT
esp execution priority = DEFAULT
esp execution stacksize = DEFAULT
xp_cmdshell context = DEFAULT
start mail session = DEFAULT
event logging = DEFAULT
log audit logon success = DEFAULT
log audit logon failure = DEFAULT
event log computer name = DEFAULT
enable rep agent threads = DEFAULT
enable cis = DEFAULT
cis connect timeout = DEFAULT
cis bulk insert batch size = DEFAULT
max cis remote connections = DEFAULT
cis packet size = DEFAULT
cis cursor rows = DEFAULT
enable snmp = DEFAULT
enable file access = DEFAULT
cis bulk insert array size = DEFAULT
enable full-text search = DEFAULT
cis rpc handling = DEFAULT
enable java = DEFAULT
size of process object heap = DEFAULT
size of shared class heap = 8000
size of global fixed heap = DEFAULT
number of java sockets = 2560
enable enterprise java beans = DEFAULT
enable DTM = DEFAULT
enable xact coordination = DEFAULT
xact coordination interval = DEFAULT
number of dtx participants = DEFAULT
strict dtm enforcement = DEFAULT
txn to pss ratio = DEFAULT
dtm lock timeout period = DEFAULT
dtm detach timeout period = DEFAULT
dump on conditions = DEFAULT
maximum dump conditions = DEFAULT
number of ccbs = DEFAULT
caps per ccb = DEFAULT
average cap size = DEFAULT
enable monitoring = DEFAULT
sql text pipe active = DEFAULT
sql text pipe max messages = DEFAULT
plan text pipe active = DEFAULT
plan text pipe max messages = DEFAULT
statement pipe active = DEFAULT
statement pipe max messages = DEFAULT
errorlog pipe active = DEFAULT
errorlog pipe max messages = DEFAULT
deadlock pipe active = DEFAULT
deadlock pipe max messages = DEFAULT
wait event timing = DEFAULT
process wait events = DEFAULT
object lockwait timing = DEFAULT
SQL batch capture = DEFAULT
statement statistics active = DEFAULT
per object statistics active = DEFAULT
max SQL text monitored = DEFAULT
performance monitoring option = DEFAULT
max mem 8g,
data cache 1900m 有点小了
看看sysmon里的 datacache 命中率.
以前不慢,最近慢的话,看看统计值是否很久未更新了.
抓一些sql看看,执行计划是否有问题.
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