Hi,
I'm trying to build a script which retrieve "health" key ratio from my Informix 7.3 DB.
Here is the info i retrieve, most of them from onstat -p output:
ReadCache_pct_used
WriteCache_pct_used
BufferWait_pct (=BUFWAITS/(PAGEREADS+BUFWRITS))
LockWaitpct (=(LockWaits/Lockrequest) *100)
ReadAheadpct (=(RA-pgsused/(idxa-ra + idx-ra + da-ra)) *100)
PhysBuff_pct_used
LogicalBuff_pct_used
My first question is:
Did i forgot a usefull information to monitor the DB health?
Is there other key ratio that i have to monitor?
The other question is about a weird result i receive with my script:
My Buffer_Wait_pct value is about 170/190 ???
I've try to launch a onstat -z, this ratio has fall to zero and grown up to 180 in less than one day !
Can someone help me?
Thanks!
--------------------------------------------------
Informix Dynamic Server Version 7.31.UC5 -- On-Line (Prim) -- Up 12 days 06:46:08 -- 98304 Kbytes
Profile
dskreads pagreads bufreads %cached dskwrits pagwrits bufwrits %cached
90711544 5504961 1182913300 92.33 2950967 3818322 27997598 89.46
isamtot open start read write rewrite delete commit rollbk
622102440 5906529 58067206 384760327 7652773 5127270 739642 62575 1713
gp_read gp_write gp_rewrt gp_del gp_alloc gp_free gp_curs
0 0 0 0 0 0 0
ovlock ovuserthread ovbuff usercpu syscpu numckpts flushes
0 0 5 7579.80 4444.24 935 2880
bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans
63458950 3 1158986121 0 0 131 126545 169667
ixda-RA idx-RA da-RA RA-pgsused lchwaits
38381840 269651 26250774 64741676 88241
--------------------------------------------
#**************************************************************************
#
# INFORMIX SOFTWARE, INC.
#
# Title: onconfig
# Description: Informix Dynamic Server Configuration Parameters
#
#**************************************************************************
# Root Dbspace Configuration
ROOTNAME rootdbs # Root dbspace name
ROOTPATH /u/informix/rrootdbs # Path for device containing root dbspace
ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes)
ROOTSIZE 50000 # 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 10000 # Physical log file size (Kbytes)
# Logical Log Configuration
LOGFILES 80 # Number of logical log files
LOGSIZE 5000 # Logical log size (Kbytes)
# Diagnostics
MSGPATH /u/informix/online.log # System message log file path
CONSOLE /dev/null # 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
# EXPLOITATION
TAPEDEV /dev/rStp0 # Tape device path
TAPEBLK 16 # Tape block size (Kbytes)
TAPESIZE 35000000 # Maximum amount of data to put on tape (Kbytes)
# Log Archive Tape Device
# EXPLOITATION
LTAPEDEV /u/informix/log/tapelog
LTAPEBLK 4 # Log tape block size (Kbytes)
LTAPESIZE 2000000 # Max amount of data to put on log tape (Kbytes)
# Optical
STAGEBLOB # Informix Dynamic Server/Optical staging area
# System Configuration
SERVERNUM 1 # Unique id corresponding to a Dynamic Server instance
NETTYPE ipcshm,1,100,NET # Configure poll thread(s) for nettype
NETTYPE tlitcp,1,100,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 0 # 0 for single-processor, 1 for multi-processor
NUMCPUVPS 1 # Number of user (cpu) vps
SINGLE_CPU_VP 1 # 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 1000000 # Maximum number of locks
BUFFERS 5000 # Maximum number of shared buffers
NUMAIOVPS 3 # Number of IO vps
PHYSBUFF 128 # Physical log buffer size (Kbytes)
LOGBUFF 32 # Logical log buffer size (Kbytes)
LOGSMAX 400 # Maximum number of logical log files
CLEANERS 4 # Number of buffer cleaner processes
SHMBASE 0x0 # Shared memory base address
#SHMBASE 0x82000000L # Shared memory base address
SHMVIRTSIZE 16000 # initial virtual shared memory segment size
SHMADD 2048 # 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 15 # LRU percent dirty begin cleaning limit
LRU_MIN_DIRTY 5 # 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)
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 240 # 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)
# 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 tmpdbs # 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
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
PC_POOLSIZE 200 # Nombre de procedures chargees en memoire=200/2-1=99
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
I'm trying to build a script which retrieve "health" key ratio from my Informix 7.3 DB.
Here is the info i retrieve, most of them from onstat -p output:
ReadCache_pct_used
WriteCache_pct_used
BufferWait_pct (=BUFWAITS/(PAGEREADS+BUFWRITS))
LockWaitpct (=(LockWaits/Lockrequest) *100)
ReadAheadpct (=(RA-pgsused/(idxa-ra + idx-ra + da-ra)) *100)
PhysBuff_pct_used
LogicalBuff_pct_used
My first question is:
Did i forgot a usefull information to monitor the DB health?
Is there other key ratio that i have to monitor?
The other question is about a weird result i receive with my script:
My Buffer_Wait_pct value is about 170/190 ???
I've try to launch a onstat -z, this ratio has fall to zero and grown up to 180 in less than one day !
Can someone help me?
Thanks!
--------------------------------------------------
Informix Dynamic Server Version 7.31.UC5 -- On-Line (Prim) -- Up 12 days 06:46:08 -- 98304 Kbytes
Profile
dskreads pagreads bufreads %cached dskwrits pagwrits bufwrits %cached
90711544 5504961 1182913300 92.33 2950967 3818322 27997598 89.46
isamtot open start read write rewrite delete commit rollbk
622102440 5906529 58067206 384760327 7652773 5127270 739642 62575 1713
gp_read gp_write gp_rewrt gp_del gp_alloc gp_free gp_curs
0 0 0 0 0 0 0
ovlock ovuserthread ovbuff usercpu syscpu numckpts flushes
0 0 5 7579.80 4444.24 935 2880
bufwaits lokwaits lockreqs deadlks dltouts ckpwaits compress seqscans
63458950 3 1158986121 0 0 131 126545 169667
ixda-RA idx-RA da-RA RA-pgsused lchwaits
38381840 269651 26250774 64741676 88241
--------------------------------------------
#**************************************************************************
#
# INFORMIX SOFTWARE, INC.
#
# Title: onconfig
# Description: Informix Dynamic Server Configuration Parameters
#
#**************************************************************************
# Root Dbspace Configuration
ROOTNAME rootdbs # Root dbspace name
ROOTPATH /u/informix/rrootdbs # Path for device containing root dbspace
ROOTOFFSET 0 # Offset of root dbspace into device (Kbytes)
ROOTSIZE 50000 # 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 10000 # Physical log file size (Kbytes)
# Logical Log Configuration
LOGFILES 80 # Number of logical log files
LOGSIZE 5000 # Logical log size (Kbytes)
# Diagnostics
MSGPATH /u/informix/online.log # System message log file path
CONSOLE /dev/null # 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
# EXPLOITATION
TAPEDEV /dev/rStp0 # Tape device path
TAPEBLK 16 # Tape block size (Kbytes)
TAPESIZE 35000000 # Maximum amount of data to put on tape (Kbytes)
# Log Archive Tape Device
# EXPLOITATION
LTAPEDEV /u/informix/log/tapelog
LTAPEBLK 4 # Log tape block size (Kbytes)
LTAPESIZE 2000000 # Max amount of data to put on log tape (Kbytes)
# Optical
STAGEBLOB # Informix Dynamic Server/Optical staging area
# System Configuration
SERVERNUM 1 # Unique id corresponding to a Dynamic Server instance
NETTYPE ipcshm,1,100,NET # Configure poll thread(s) for nettype
NETTYPE tlitcp,1,100,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 0 # 0 for single-processor, 1 for multi-processor
NUMCPUVPS 1 # Number of user (cpu) vps
SINGLE_CPU_VP 1 # 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 1000000 # Maximum number of locks
BUFFERS 5000 # Maximum number of shared buffers
NUMAIOVPS 3 # Number of IO vps
PHYSBUFF 128 # Physical log buffer size (Kbytes)
LOGBUFF 32 # Logical log buffer size (Kbytes)
LOGSMAX 400 # Maximum number of logical log files
CLEANERS 4 # Number of buffer cleaner processes
SHMBASE 0x0 # Shared memory base address
#SHMBASE 0x82000000L # Shared memory base address
SHMVIRTSIZE 16000 # initial virtual shared memory segment size
SHMADD 2048 # 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 15 # LRU percent dirty begin cleaning limit
LRU_MIN_DIRTY 5 # 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)
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 240 # 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)
# 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 tmpdbs # 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
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
PC_POOLSIZE 200 # Nombre de procedures chargees en memoire=200/2-1=99
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
