Hi, my informix 7.31 TD5 dies occasionally an returns.

Informix Dynamic Server Version 7.31.TD5 -- On-Line -- Up 1 days 08:00:38 -- 333440 Kbytes

Message Log File: c:\informix\ol_serverimqc.log
15:43:55 Checkpoint Completed: duration was 0 seconds.
15:43:55 Checkpoint loguniq 3246, logpos 0x1649018

15:48:55 Checkpoint Completed: duration was 0 seconds.
15:48:55 Checkpoint loguniq 3246, logpos 0x18dc018

15:49:38 Logical Log 3246 Complete.
15:53:55 Checkpoint Completed: duration was 0 seconds.
15:53:55 Checkpoint loguniq 3247, logpos 0x908360

15:58:55 Checkpoint Completed: duration was 0 seconds.
15:58:55 Checkpoint loguniq 3247, logpos 0xfc5018

16:00:19 Assert Failed: No Exception Handler
16:00:19 Informix Dynamic Server Version 7.31.TD5
16:00:19 Who: Session(2, informix@, 0, 0)
Thread(7, soctcppoll, 0, 14)
Exception at Addr: 0x7c8224b2, TOS: 0x102758e4, FP:0xdb0a18, Exc: c0000005
16:00:19 Results: Exception Caught. Type: MT_EX_OS, Context: mem
16:00:19 Action: Please notify Informix Technical Support.


Informix Dynamic Server Version 7.31.TD5 -- On-Line -- Up 1 days 08:00:38 -- 333440 Kbytes

Stack for thread: 7 soctcppoll
base: 0x10270000
len: 24576
pc: 0x006a5bae
tos: 0x10275dd4
state: running
vp: 14

0x006e63f0 (oninit)_NT_PollCreateWindow(0x10275e98, 0x10275e48, 0x6e63f0, 0x170114)
0x10062668 (***nosymtab***)0x10062668
Changing data structure forced command termination.


C:\informix\bin\onstat -g ses 2:

Informix Dynamic Server Version 7.31.TD5 -- On-Line -- Up 1 days 08:00:39 -- 333440 Kbytes

session #RSAM total used
id user tty pid hostname threads memory memory
2 informix - 0 - 0 8192 5744

Memory pools count 1
name class addr totalsize freesize #allocfrag #freefrag
2 V 10258018 8192 2448 9 1

name free used name free used
overhead 0 120 scb 0 96
gentcb 0 576 ostcb 0 40
sqscb 0 4864 fragman 0 48


What´s the problem?
Thanks.

good question!!! (lol) ...

copy here your onconfig to get more information...

if you can, upgrade to 7.31 TD9 or my personal suggestion: go to Unix/Linux, works better is more faster than windows....

Informix Dynamic Server Version 7.31.TD5 -- On-Line -- Up 3 days 22:12:23 -- 341632 Kbytes

Configuration File: C:\informix/etc/ONCONFIG.ol_serverimqc
#************************************************* *************************
#
# INFORMIX SOFTWARE, INC.
#
# Title: onconfig.std
# Description: Informix Dynamic Server Configuration Parameters
#
#************************************************* *************************

# Root Dbspace Configuration

ROOTNAME rootdbs # Root dbspace name
ROOTPATH c:\datos\IFMXDATA\ol_serverimqc\rootdbs_dat.000 # Path for device containing root dbspace
ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes)
ROOTSIZE 1024000 # 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 60000 # Logical log size (Kbytes)
LOG_BACKUP_MODE MANUAL # Logical log backup mode (MANUAL, CONT)

# Diagnostics

MSGPATH c:\informix\ol_serverimqc.log # System message log file path
CONSOLE c:\informix\conol_serverimqc.log # System console message path
ALARMPROGRAM # Alarm program path

# System Diagnostic Script.
# SYSALARMPROGRAM - Full path of the system diagnostic script (e.g.
# c:\informix\etc\evidence.bat.) Set this parameter
# if you want a different Diagnostic Script than
# {INFORMIXDIR}\etc\evidence.bat, which is default.

# System Archive Tape Device

TAPEDEV C:\COPIAS\INFORMIX\archive
#TAPEDEV NULL
#TAPEDEV \\.\TAPE0 # Tape device path
TAPEBLK 16 # Tape block size (Kbytes)
TAPESIZE 100000240 # Maximum amount of data to put on tape (Kbytes)

# Log Archive Tape Device

LTAPEDEV C:\COPIAS\INFORMIX\logs
#LTAPEDEV NULL
#LTAPEDEV \\.\TAPE1 # Log tape device path
LTAPEBLK 16 # Log tape block size (Kbytes)
LTAPESIZE 100000240 # Max amount of data to put on log tape (Kbytes)

# Optical

STAGEBLOB # Informix Dynamic Server/Optical staging area
OPTICAL_LIB_PATH # Location of Optical Subsystem driver DLL

# System Configuration

SERVERNUM 0 # Unique id corresponding to a server instance
stance
DBSERVERNAME ol_serverimqc # Name of default Dynamic Server
DBSERVERALIASES db_serverimqc # List of alternate dbservernames

NETTYPE onsoctcp,1,,NET # Override sqlhosts nettype parameters
#digital NETTYPE onsoctcp,2,200,NET # Override sqlhosts nettype parameters

DEADLOCK_TIMEOUT 60 # Max time to wait of lock in distributed env.

RESIDENT 0 # Forced residency flag (Yes = 1, No = 0)
#digital RESIDENT 1 # Forced residency flag (Yes = 1, No = 0)
MULTIPROCESSOR 1 # 0 for single-processor, 1 for multi-processor
NUMCPUVPS 8 # 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 80000 # Maximum number of locks
BUFFERS 60000 # Maximum number of shared buffers

#digital LOCKS 40000 # Maximum number of locks
#digital BUFFERS 10000 # Maximum number of shared buffers
NUMAIOVPS 1 # Number of IO vps
#digital NUMAIOVPS 2 # Number of IO vps

PHYSBUFF 32 # Physical log buffer size (Kbytes)
LOGBUFF 32 # Logical log buffer size (Kbytes)

#digital PHYSBUFF 64 # Physical log buffer size (Kbytes)
#digital LOGBUFF 64 # Logical log buffer size (Kbytes)
LOGSMAX 20 # Maximum number of logical log files
CLEANERS 50 # Number of buffer cleaner processes
#digital CLEANERS 7 # Number of buffer cleaner processes
SHMBASE 0xC000000L # Shared memory base address
SHMVIRTSIZE 32768 # 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 50 # 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 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 \tmp # 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 c:\informix\bar_ol_serverimqc.log #Path of log file for onbar.exe
BAR_MAX_BACKUP 0
BAR_RETRY 1
BAR_NB_XPORT_COUNT 10
BAR_XFER_BUF_SIZE 15
BAR_BSALIB_PATH c:\ISM\2.20\bin\libbsa.dll # Location of ISM XBSA DLL

RESTARTABLE_RESTORE ON #To support restartable restore..values on/off

# Informix Storage Manager variables
ISM_DATA_POOL ISMData
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 temporal # 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 0 # Maximum allowed pdqpriority
DS_MAX_QUERIES 32 # Maximum number of decision support queries
DS_TOTAL_MEMORY 4096 # Decision support memory (Kbytes)
DS_MAX_SCANS 1048576 # Maximum number of decision support scans
DATASKIP # 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

Theoretically that is ok .
Just a some notes:
- I presume your machine have 8 physical processor, it's right ?
- Configure you CPUVPs with a value equal or less a amount of physical CPUs.
If the machine have 2 CPUs, work with 1 or 2 CPUVP .
- Set a value to all fields, like: NETTYPE onsoctcp,1,30,NET
- NUMAIOVPs = 1 is terrible... at least 4 , the right calc is 2 CPUVPs for at chunk ( 10 chunks = 20 AIOVPs )

I think that two config maybe can related with your crashs. CPUVPs and NETTYPE.
Sorry... three .... your Windows too..


I'm sorry not help more... but this is the only thinks I really see a big problem to your instance.

Another vantages to migrate a Linux SO:
- Linux is Free!
- You can use a KERNEL I/O . Its very fast!
- More reliable
- More stable..

Thank´s I will try to change those values.