Re: Backup Very Slow
I suggest you to check the contention level of your database first.
Your configuration shows that you put everything in rootdb DBspace.
This is not a wise move, espeically you have a lot concurrent users
online all the time. It's difficult to prevent users from accessing
the same data pages. That surely will slow down the backup of your
data. All I can say is that the backup speed is way too slow in your
case.
If possible, please also observe the application performance when the
backup starts at 16:00. If the application perfformance also slows
down significantly, it may prove my theory.
Darren_Jacobs@carmax.com wrote:
> Prior to moving to a data center (few months back) my backups were to
> Ultrium 3's. I could backup 330 gigs in 2 hrs (HP 11.11 IDS 9.40 ,7420).
> Before the move to Ultriums I was using DLT 320's with the backup taking 5+
> hrs.
>
> Thanks
>
>
>
>
> "DORN B"
> <varadorn@gmail.c
> om> To
> Sent by: PapaKiKi <agwanzura@okzim.co.zw>
> informix-list-bou cc
> nces@iiug.org informix-list@iiug.org
> Subject
> Re: Backup Very Slow
> 09/05/2006 06:03
> PM
>
>
>
>
>
>
>
>
> Another way that I did before was to change the tape backup device from DLT
> to LTO if your budget is allowed.
> It greatly reduces the backup time for us.
>
> Dorn B.
>
>
> On 5 Sep 2006 10:27:45 -0700, PapaKiKi <agwanzura@okzim.co.zw> wrote:
> have Informix IDS 7.3 on an Rp4440 server with UNIX 11.0 I am using
> DLT Tape drives and 80gig tapes to do my back up on a 98gig database.
> My problem is that a level 0 backup takes 24hrs to finish. Using
> ontape . I need to reduce the time.My database has 405 users at peak
> and an average of 240 users during the day .I normally start my
> backup at 1600hrs.I need help to reduce this time.Any help or
> suggestions are welcome. Here is my configuration file ( onconfig.live)
>
> #**************************************************************************
>
> #
> # INFORMIX SOFTWARE, INC.
> #
> # Title: onconfig.std
> # Description: Informix Dynamic Server Configuration Parameters
> #
> #**************************************************************************
>
>
> # Root Dbspace Configuration
>
> ROOTNAME rootdbs # Root dbspace name
> ROOTPATH /dev/rootdbs # Path for device containing root
> dbspace
> ROOTOFFSET 0 # Offset of root dbspace into device
> (Kbytes)
> ROOTSIZE 1000000 # 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 250000 # Physical log file size (Kbytes)>
> # Logical Log Configuration
>
> LOGFILES 30 # Number of logical log files
> LOGSIZE 5000 # 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 0>
> # System Archive Tape Device
>
> TAPEDEV /dev/rmt/c8t3d0BEST # Tape device path
> TAPEBLK 6144 # Tape block size (Kbytes)
> TAPESIZE 80000000 # Maximum amount of data to put on tape
> (Kbytes)>
> # Log Archive Tape Device
>
> LTAPEDEV /dev/rmt/1m # Log tape device pat
> LTAPEBLK 1024 # Log tape block size (Kbytes)
> LTAPESIZE 4000000 # 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
> DBSERVERNAME ok_srvr # Name of default database server
> DBSERVERALIASES ok_tcp # List of alternate dbservernames
> NETTYPE ipcshm,1,600,CPU # Configure poll thread(s) for nettype
> NETTYPE soctcp,1,5,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 2 # 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 500000 # Maximum number of locks
> BUFFERS 200000 # Maximum number of shared buffers
> NUMAIOVPS 8 # Number of IO vps
> PHYSBUFF 128 # Physical log buffer size (Kbytes)
> LOGBUFF 128 # Logical log buffer size (Kbytes)> LOGSMAX 100 # Maximum number of logical log files
> CLEANERS 127 # Number of buffer cleaner processes
> SHMBASE 0x0 # Shared memory base address
> SHMVIRTSIZE 300000 # initial virtual shared memory segment
> size
> SHMADD 40000 # Size of new shared memory segments
> (Kbytes)
> SHMTOTAL 0 # Total shared memory (Kbytes).
> 0=>unlimited
> CKPTINTVL 360 # Check point interval (in sec)
> LRUS 127 # Number of LRU queues
> LRU_MAX_DIRTY 1 # 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 64 # Stack size (Kbytes)>
> # System Page Size
> # BUFFSIZE - Dynamic Server no longer supports this configuration
> parameter.
> # To determine the page size used by Dyn