IDS Forum

RE: Maximum Server Connections

Posted By: Jane Vohden
Date: Friday, 14 May 2004, at 1:26 p.m.

I'm sorry, I guess my onconfig file didn't attach. I've included it in the
text here. I have tried the several variations of NETTYPE.

Thanks for any help you can provide.
Jane Vohden
Database Administrator
jvohden@co.fairbanks.ak.us

informix:/apps/informix/etc $ more onconfig.dev
#**************************************************************************
#
# INFORMIX SOFTWARE, INC.
#
# Title: onconfig.dev 1/4/01
# Description: Informix Dynamic Server 2000 Configuration Parameters
#
#**************************************************************************

# Root Dbspace Configuration

ROOTNAME devrootdbs # Root dbspace name
ROOTPATH /dev/vg01/rdevrootdbs # Path for device containing root
dbspace
ROOTOFFSET 0 # Offset of root dbspace into device
(Kbytes)
ROOTSIZE 614400 # 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 devphydbs # Location (dbspace) of physical log
PHYSFILE 102294 # Physical log file size (Kbytes)

# Logical Log Configuration

LOGFILES 29 # Number of logical log files
LOGSIZE 10240 # Logical log size (Kbytes)

# Diagnostics

MSGPATH /apps/informix/online.dev # System message log file path
CONSOLE /dev/console # System console message path
ALARMPROGRAM /apps/informix/etc/log_full.sh # Alarm program path
TBLSPACE_STATS 1 # Maintain tblspace statistics

# System Archive Tape Device

TAPEDEV /dev/null # Tape device path
TAPEBLK 512 # Tape block size (Kbytes)
TAPESIZE 12500000 # Maximum amount of data to put on tape
(Kbytes)

# Log Archive Tape Device

LTAPEDEV /dev/null # Log tape device path
LTAPEBLK 512 # Log tape block size (Kbytes)
LTAPESIZE 12500000 # Max amount of data to put on log tape
(Kbytes)

# Optical

STAGEBLOB # Informix Dynamic Server 2000 staging area

# System Configuration

SERVERNUM 5 # Unique id corresponding to a OnLine
instance
DBSERVERNAME dev # Name of default database server
DBSERVERALIASES devtcp # List of alternate dbservernames
#NETTYPE ipcshm,2,100,cpu # Configure poll thread(s) for
nettype
NETTYPE ipcshm,1,100,CPU # Configure poll thread(s) for nettype
NETTYPE soctcp,1,100,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 1 # 0 for single-processor, 1 for
multi-processor
NUMCPUVPS 3 # 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 0 # Affinity number of processors

# Shared Memory Parameters

LOCKS 30000 # Maximum number of locks
BUFFERS 30000 # Maximum number of shared buffers
NUMAIOVPS 6 # Number of IO vps
PHYSBUFF 128 # Physical log buffer size (Kbytes)
LOGBUFF 128 # Logical log buffer size (Kbytes)
CLEANERS 15 # Number of buffer cleaner processes
SHMBASE 0x0 # Shared memory base address
SHMVIRTSIZE 40960 # 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 15 # Number of LRU queues
LRU_MAX_DIRTY 20 # LRU percent dirty begin cleaning limit
LRU_MIN_DIRTY 10 # LRU percent dirty end cleaning limit
LTXHWM 40 # Long transaction high water mark
percentage
LTXEHWM 50 # Long transaction high water mark
(exclusive)
TXTIMEOUT 0x12c # Transaction timeout (in sec)
STACKSIZE 32 # Stack size (Kbytes)

# System Page Size
# BUFFSIZE - OnLine no longer supports this configuration parameter.
# To determine the page size used by OnLine 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
DRINTERVAL 30 # DR max time between DR buffer flushes (in
sec)
DRTIMEOUT 30 # DR network timeout (in sec)
DRLOSTFOUND /apps/informix/etc/dr.lostfound # DR lost+found file path

# CDR Variables
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
(Kb
ytes)
CDR_NIFCOMPRESS 0 # Link level compression (-1 never, 0 none,
9 ma
x)

# 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
RESTARTABLE_RESTORE off
BAR_PROGRESS_FREQ 0

# Informix Storage Manager variables
ISM_DATA_POOL ISMData
ISM_LOG_POOL ISMLogs

# Read Ahead Variables
RA_PAGES 32 # Number of pages to attempt to read ahead
RA_THRESHOLD 20 # Number of pages left before next group

# DBSPACETEMP:
# OnLine equivalent of DBTEMP for SE. This is the list of dbspaces
# that the OnLine SQL Engine will use to create temp tables etc.
# If specified it must be a colon separated list of dbspaces that exist
# when the OnLine 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 devtmp1dbs:devtmp2dbs:devtmp3dbs # 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 OnLine 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
OnLine)
DUMPCNT 1 # Number of shared memory or gcore dumps for

# a single user's session

FILLFACTOR 90 # Fill factor for building indexes

# method for OnLine to use when determining current time
USEOSTIME 0 # 0: use internal time(fast), 1: get time
from O
S(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 10 # 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

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


ONDBSPACEDOWN 2 # Dbspace down option: 0 = CONTINUE, 1 =
ABORT,
2 = WAIT
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

SBSPACENAME # Default smartblob space name - this is
where b
lobs
# go if no sbspace is specified when the smartblob is

# created. It is also used by some datablades as
# the location to put their smartblobs.
SYSSBSPACENAME # Default smartblob space for use by the
Informi
x
# Server. This is used primarily for Informix Server
# system statistics collection.

BLOCKTIMEOUT 3600 # Default timeout for system block
SYSALARMPROGRAM /apps/informix/etc/evidence.sh # System Alarm program path

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

ALLOW_NEWLINE 0 # embedded newlines(Yes = 1, No = 0 or
anything
but 1)

#
# The following are default settings for enabling Java in the database.
# Replace all occurrences of /usr/informix with the value of $INFORMIXDIR.

#VPCLASS jvp,num=1 # Number of JVPs to start with

JVPJAVAHOME /apps/informix/extend/krakatoa/jre/
# JRE installation root directory
JVPHOME /apps/informix/extend/krakatoa # Krakatoa installation
directory

JVPPROPFILE /apps/informix/extend/krakatoa/.jvpprops # JVP property file
JVPLOGFILE /apps/informix/jvp.dev # JVP log file.

JDKVERSION 1.2 # JDK version supported by this server
JVMTHREAD native # Java VM thread type (green or native)

# The path to the JRE libraries relative to JVPJAVAHOME
JVPJAVALIB /lib/sparc/

# The JRE libraries to use for the Java VM

JVPJAVAVM hpi:jvm:java:net:math:zip:jpeg

# Classpath to use upon Java VM start-up (use _g version for debugging)

# JVPCLASSPATH
/apps/informix/extend/krakatoa/krakatoa.jar:/apps/informix/exten
d/krakatoa/jdbc.jar
JVPCLASSPATH
/apps/informix/extend/krakatoa/krakatoa_g.jar:/apps/informix/ext
end/krakatoa/jdbc_g.jar

CDR_SERIAL 0,0 # Serial Column Sequence
CDR_DBSPACE # dbspace for syscdr database
CDR_QHDR_DBSPACE # CDR queue dbspace (default same as
catalog)
CDR_QDATA_SBSPACE # CDR queue smart blob space
CDR_QDATA_SBFLAGS 2 # Log/no-log (default no log)
BAR_DEBUG_LOG /tmp/bar_dbug.log # ON-Bar Debug Log - not in /tmp please
informix:/apps/informix/etc $

-----Original Message-----
From: owner-informix-list@iiug.org [mailto:owner-informix-list@iiug.org] On
Behalf Of Enor Mouspenis
Sent: Friday, May 14, 2004 2:35 AM
To: informix-list@iiug.org
Subject: Re: Maximum Server Connections

Jane Vohden wrote:

>
> This message is in MIME format. Since your mail reader does not
> understand this format, some or all of this message may not be legible.
>
> ------_=_NextPart_000_01C43968.5417CA26
> Content-Type: text/plain
>
> Today we experienced an odd problem.
>
> The 51st person to access the database would get the following message:
>
> The appl process cannot connect to the database server dev.
> (Error -25588, ISAM8
>
> Up until that 51st user, everything was running fine. When user
> connections went back down to 50 we were fine again.
>
> The 25588 error message says:
> An error in the application can produce this message. Check your
> CONNECT statement and the sqlhosts file. A system failure can also
> produce this message. If you can find no immediate cause for the
> failure, note the circumstances and contact your database server
> administrator for assistance.
>
> The shared memory communication subsystem is down or not functioning.
> Contact the database server administrator to report the problem.
>
> We are working with the vendor that maintains the software and they
> haven't come up with a resolution yet. I've been trying different
> onconfig parameter settings all night and haven't come up with
> anything either.
> I've
> spent the most time playing with NETTYPE. Until today I didn't even
> have NETTYPE defined in my onconfig. I have 3 different instances of IDS
and
> they all are manifesting this same problem. I have attached the onconfig
> file if that will help.
>
> I appreciate any ideas anyone can give me.

> NETTYPE ipcshm,1,100,CPU # Configure poll thread(s) for =

I am not understanding, what happens with ipcshm,1,200,CPU?
Or ipcshm,3,300,CPU?

--
Enor

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