checkpoint问题

tpysh

不好意思，把老帖翻出来，因为我也遇见了类似的问题～～～

我的机器做金融交易的
我的cp倒是每5分钟一次，但是在终端结账（交易量集中且大量）的时候，duration一次要2－3秒，可是实际的终端数并不大～～
是不是在做cp的时候，数据库表就会锁死，不能在处理新的交易了？？
如果终端量加大，或者到了五一，十一之类的节假日，duration一次的时间过长，系统会不会处理不了～～

我的onconfig参数：
# Root Dbspace Configuration

ROOTNAME        rootdbs         # Root dbspace name
ROOTPATH        /dev/rd1110     # Path for device containing root dbspace
ROOTOFFSET      0               # Offset of root dbspace into device (Kbytes)
ROOTSIZE        2000000         # Size of root dbspace (Kbytes)

# Disk Mirroring Configuration Parameters

MIRROR          0               # Mirroring flag (Yes = 1, No = 0)
MIRRORPATH                      # Path for device containing mirrored root
MIRROROFFSET    0               # Offset into mirrored device (Kbytes)

# Physical Log Configuration

PHYSDBS         rootdbs         # Location (dbspace) of physical log
PHYSFILE        100000          # Physical log file size (Kbytes)

# Logical Log Configuration

LOGFILES        20              # Number of logical log files
LOGSIZE         15000           # Logical log size (Kbytes)

# Diagnostics

MSGPATH         /u/informix/online.log # System message log file path
CONSOLE         /dev/console    # System console message path
ALARMPROGRAM    /u/informix/etc/log_full.sh # Alarm program path
SYSALARMPROGRAM /u/informix/etc/evidence.sh # System Alarm program path
TBLSPACE_STATS  1               

# System Archive Tape Device

TAPEDEV         /dev/null       # Tape device path       
TAPEBLK         16              # Tape block size (Kbytes)
TAPESIZE        10240           # Maximum amount of data to put on tape (Kbytes)

# Log Archive Tape Device

LTAPEDEV        /dev/null       # Log tape device path
LTAPEBLK        16              # Log tape block size (Kbytes)
LTAPESIZE       10240           # Max amount of data to put on log tape (Kbytes)

# Optical

STAGEBLOB                       # Informix Dynamic Server/Optical staging area

# System Configuration

SERVERNUM       0               # Unique id corresponding to a Dynamic Server instance
DBSERVERNAME    online          # Name of default database server
DBSERVERALIASES                 # List of alternate dbservernames
NETTYPE         ipcshm,,100,CPU # Configure poll thread(s) for nettype
NETTYPE         tlitcp,,20,NET  # Configure poll thread(s) for nettype
DEADLOCK_TIMEOUT 60              # Max time to wait of lock in distributed env.
RESIDENT        0               # Forced residency flag (Yes = 1, No = 0)

MULTIPROCESSOR  0               # 0 for single-processor, 1 for multi-processor
NUMCPUVPS       1               # Number of user (cpu) vps
SINGLE_CPU_VP   0               # If non-zero, limit number of cpu vps to one

NOAGE           0               # Process aging
AFF_SPROC       0               # Affinity start processor
AFF_NPROCS      0               # Affinity number of processors

# Shared Memory Parameters

LOCKS           200000          # Maximum number of locks
BUFFERS         2000            # Maximum number of shared buffers
NUMAIOVPS                       # Number of IO vps
PHYSBUFF        64              # Physical log buffer size (Kbytes)
LOGBUFF         64              # Logical log buffer size (Kbytes)
LOGSMAX         30              # Maximum number of logical log files
CLEANERS        1               # Number of buffer cleaner processes
SHMBASE         0x10000000        # Shared memory base address
SHMVIRTSIZE     8000            # initial virtual shared memory segment size
SHMADD          8192            # Size of new shared memory segments (Kbytes)
SHMTOTAL        0               # Total shared memory (Kbytes). 0=>unlimited
CKPTINTVL       300             # Check point interval (in sec)
LRUS            8               # Number of LRU queues
#LRU_MAX_DIRTY   60              # LRU percent dirty begin cleaning limit
#LRU_MIN_DIRTY   50              # LRU percent dirty end cleaning limit
LRU_MAX_DIRTY   25              # LRU percent dirty begin cleaning limit
LRU_MIN_DIRTY   0              # LRU percent dirty end cleaning limit
LTXHWM          50              # Long transaction high water mark percentage
LTXEHWM         60              # Long transaction high water mark (exclusive)
TXTIMEOUT       0x12c             # Transaction timeout (in sec)
STACKSIZE       32              # Stack size (Kbytes)

# System Page Size
# BUFFSIZE - Dynamic Server no longer supports this configuration parameter.
#            To determine the page size used by Dynamic Server on your platform
#            see the last line of output from the command, 'onstat -b'.


# Recovery Variables
# OFF_RECVRY_THREADS:
# Number of parallel worker threads during fast recovery or an offline restore.
# ON_RECVRY_THREADS:
# Number of parallel worker threads during an online restore.

OFF_RECVRY_THREADS 10              # Default number of offline worker threads
ON_RECVRY_THREADS 1               # Default number of online worker threads

# Data Replication Variables
# DRAUTO: 0 manual, 1 retain type, 2 reverse type
DRAUTO          0               # DR automatic switchover
DRINTERVAL      30              # DR max time between DR buffer flushes (in sec)
DRTIMEOUT       30              # DR network timeout (in sec)
DRLOSTFOUND     /u/informix/etc/dr.lostfound # DR lost+found file path

# CDR Variables
CDR_LOGBUFFERS  2048            # size of log reading buffer pool (Kbytes)
CDR_EVALTHREADS 1,2             # evaluator threads (per-cpu-vp,additional)
CDR_DSLOCKWAIT  5               # DS lockwait timeout (seconds)
CDR_QUEUEMEM    4096            # Maximum amount of memory for any CDR queue (Kbytes)
CDR_LOGDELTA    30              # % of log space allowed in queue memory
CDR_NUMCONNECT  16              # Expected connections per server
CDR_NIFRETRY    300             # Connection retry (seconds)
CDR_NIFCOMPRESS 0               # Link level compression (-1 never, 0 none, 9 max)

# Backup/Restore variables
BAR_ACT_LOG     /tmp/bar_act.log
BAR_MAX_BACKUP  0               
BAR_RETRY       1               
BAR_NB_XPORT_COUNT 10              
BAR_XFER_BUF_SIZE 31              

# Informix Storage Manager variables
ISM_DATA_POOL   ISMData         # If the data pool name is changed, be sure to
                                # update $INFORMIXDIR/bin/onbar.  Change to
                                # ism_catalog -create_bootstrap -pool <new name>
ISM_LOG_POOL    ISMLogs         

# Read Ahead Variables
RA_PAGES                        # Number of pages to attempt to read ahead
RA_THRESHOLD                    # Number of pages left before next group

# DBSPACETEMP:
# Dynamic Server equivalent of DBTEMP for SE. This is the list of dbspaces
# that the Dynamic Server SQL Engine will use to create temp tables etc.
# If specified it must be a colon separated list of dbspaces that exist
# when the Dynamic Server system is brought online.  If not specified, or if
# all dbspaces specified are invalid, various ad hoc queries will create
# temporary files in /tmp instead.

DBSPACETEMP                     # Default temp dbspaces

# DUMP*:
# The following parameters control the type of diagnostics information which
# is preserved when an unanticipated error condition (assertion failure) occurs
# during Dynamic Server operations.
# For DUMPSHMEM, DUMPGCORE and DUMPCORE 1 means Yes, 0 means No.

DUMPDIR         /tmp            # Preserve diagnostics in this directory
DUMPSHMEM       1               # Dump a copy of shared memory
DUMPGCORE       0               # Dump a core image using 'gcore'
DUMPCORE        0               # Dump a core image (Warning:this aborts Dynamic Server)
DUMPCNT         1               # Number of shared memory or gcore dumps for
                                # a single user's session

FILLFACTOR      90              # Fill factor for building indexes

# method for Dynamic Server to use when determining current time
USEOSTIME       0               # 0: use internal time(fast), 1: get time from OS(slow)

# Parallel Database Queries (pdq)
MAX_PDQPRIORITY 100             # Maximum allowed pdqpriority
DS_MAX_QUERIES                  # Maximum number of decision support queries
DS_TOTAL_MEMORY                 # Decision support memory (Kbytes)
DS_MAX_SCANS    1048576         # Maximum number of decision support scans       
DATASKIP        off             # List of dbspaces to skip

# OPTCOMPIND
# 0 => Nested loop joins will be preferred (where
#      possible) over sortmerge joins and hash joins.
# 1 => If the transaction isolation mode is not
#      "repeatable read", optimizer behaves as in (2)
#      below.  Otherwise it behaves as in (0) above.
# 2 => Use costs regardless of the transaction isolation
#      mode.  Nested loop joins are not necessarily
#      preferred.  Optimizer bases its decision purely
#      on costs.
OPTCOMPIND      2               # To hint the optimizer

ONDBSPACEDOWN   2               # Dbspace down option: 0 = CONTINUE, 1 = ABORT, 2 = WAIT
LBU_PRESERVE    0               # Preserve last log for log backup
OPCACHEMAX      0               # Maximum optical cache size (Kbytes)

# HETERO_COMMIT (Gateway participation in distributed transactions)
# 1 => Heterogeneous Commit is enabled
# 0 (or any other value) => Heterogeneous Commit is disabled
HETERO_COMMIT   0               

# Optimization goal: -1 = ALL_ROWS(Default), 0 = FIRST_ROWS
OPT_GOAL        -1              

# Optimizer DIRECTIVES ON (1/Default) or OFF (0)
DIRECTIVES      1               

# Status of restartable restore
RESTARTABLE_RESTORE off

[ 本帖最后由 tpysh 于 2007-3-28 16:44 编辑 ]