Раз пошла такая пьянка , то может кто подскажет...
хотелось бы уменьшить время чекпойнтов

10:05:36 Checkpoint Completed: duration was 5 seconds.
10:10:42 Checkpoint Completed: duration was 5 seconds.
10:15:47 Checkpoint Completed: duration was 6 seconds.
10:20:53 Checkpoint Completed: duration was 5 seconds.
10:26:01 Checkpoint Completed: duration was 8 seconds.
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10:36:26 Checkpoint Completed: duration was 17 seconds.
10:41:37 Checkpoint Completed: duration was 11 seconds.
10:46:42 Checkpoint Completed: duration was 5 seconds.
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10:57:12 Checkpoint Completed: duration was 17 seconds.
11:02:16 Checkpoint Completed: duration was 4 seconds.
11:07:22 Checkpoint Completed: duration was 7 seconds.
11:12:32 Checkpoint Completed: duration was 9 seconds.
11:17:38 Checkpoint Completed: duration was 6 seconds.
11:22:42 Checkpoint Completed: duration was 4 seconds.
11:27:51 Checkpoint Completed: duration was 9 seconds.
11:33:00 Checkpoint Completed: duration was 9 seconds.
11:38:11 Checkpoint Completed: duration was 11 seconds.
11:43:21 Checkpoint Completed: duration was 10 seconds.
11:48:30 Checkpoint Completed: duration was 9 seconds.
11:53:45 Checkpoint Completed: duration was 15 seconds.
11:58:54 Checkpoint Completed: duration was 9 seconds.
12:04:00 Checkpoint Completed: duration was 6 seconds.
12:09:06 Checkpoint Completed: duration was 6 seconds.
12:14:15 Checkpoint Completed: duration was 9 seconds.
12:19:20 Checkpoint Completed: duration was 5 seconds.
12:24:29 Checkpoint Completed: duration was 9 seconds.
12:29:23 Checkpoint Completed: duration was 12 seconds.
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12:30:03 Checkpoint Completed: duration was 10 seconds.
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12:35:31 Checkpoint Completed: duration was 12 seconds.
12:40:40 Checkpoint Completed: duration was 9 seconds.
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12:51:00 Checkpoint Completed: duration was 11 seconds.
12:56:14 Checkpoint Completed: duration was 14 seconds.
12:57:55 Checkpoint Completed: duration was 7 seconds.

вот конфигурация


#*************************************************************
#
# INFORMIX SOFTWARE, INC.
#
# Title: onconfig.std
# Description: Informix Dynamic Server Configuration Parameters
#
#*************************************************************

# Root Dbspace Configuration

ROOTNAME rootdbs # Root dbspace name
ROOTPATH /dev/md/rdsk/d50 # Path for device containing root dbspace
ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes)
ROOTSIZE 2097150 # Size of root dbspace (Kbytes)

# Disk Mirroring Configuration Parameters

MIRROR 1 # Mirroring flag (Yes = 1, No = 0)
MIRRORPATH /dev/md/rdsk/d84 # Path for device containing mirrored root
MIRROROFFSET 0 # Offset into mirrored device (Kbytes)

# Physical Log Configuration

PHYSDBS rootdbs # Location (dbspace) of physical log
PHYSFILE 10000 # Physical log file size (Kbytes)

# Logical Log Configuration

LOGFILES 60 # Number of logical log files
LOGSIZE 2000 # Logical log size (Kbytes)

# Diagnostics

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

# System Archive Tape Device

TAPEDEV /dev/rmt/0 # Tape device path
TAPEDEV /dev/rmt/0 # Tape device path
#TAPEDEV /dev/null
TAPEBLK 4096 # Tape block size (Kbytes)
TAPESIZE 51000000 # Maximum amount of data to put on tape (Kbytes)

# Log Archive Tape Device

LTAPEDEV /dev/null # Log tape device path
LTAPEBLK 4096 # 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 sf880on # Name of default database server
DBSERVERALIASES fast0spx,sf880tli # List of alternate dbservernames
NETTYPE ipcshm,2,100,CPU # Configure poll thread(s) for nettype
#NETTYPE tlispx,5,10,NET # Configure poll thread(s) for nettype
NETTYPE tlitcp,1,10,NET # Configure poll thread(s) for nettype
DEADLOCK_TIMEOUT 60 # Max time to wait of lock in distributed env.
RESIDENT 1 # Forced residency flag (Yes = 1, No = 0)

MULTIPROCESSOR 1 # 0 for single-processor, 1 for multi-processor
NUMCPUVPS 4 # Number of user (cpu) vps
SINGLE_CPU_VP 0 # If non-zero, limit number of cpu vps to one

NOAGE 1 # Process aging
AFF_SPROC 0 # Affinity start processor
AFF_NPROCS 4 # Affinity number of processors

# Shared Memory Parameters

LOCKS 3000000 # Maximum number of locks
BUFFERS 700000 # Maximum number of shared buffers
NUMAIOVPS # Number of IO vps
PHYSBUFF 32 # Physical log buffer size (Kbytes)
LOGBUFF 32 # Logical log buffer size (Kbytes)
LOGSMAX 60 # Maximum number of logical log files
CLEANERS 8 # Number of buffer cleaner processes
SHMBASE 0x10A000000L # 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
LTXHWM 50 # Long transaction high water mark percentage
LTXEHWM 60 # Long transaction high water mark (exclusive)
TXTIMEOUT 300 # Transaction timeout (in sec)
STACKSIZE 256 # 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 -1 # DR max time between DR buffer flushes (in sec)
DRTIMEOUT 30 # DR network timeout (in sec)
DRLOSTFOUND /opt/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_DEBUG_LOG /usr/informix/bar_dbug.log # ON-Bar Debug Log - not in /tmp pleas
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 tempdbs # 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 0 # 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 0 # 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

Процессоров четыре
LRUS CLEANERS были увеличены с 1, но никакого эффекта не дало. Врядли стоит увеличивать. (?)

Насчет SHMVIRTSIZE согласен , давно собираюсь увеличить, но как это с временем чекпойнта связано?

Я вообще то думал поиграть соотношением размеров логического и физического журнала.

забавно
не нашел в 4354.pdf никакого описания на TBLSPACE_STAT
не только в 33-й главе но и ваще

щас в новую ветку скопирую