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IDS Forum

RE: Poor performance on VMWare

Posted By: John Miller iii
Date: Tuesday, 27 May 2014, at 1:31 p.m.

In Response To: RE: Poor performance on VMWare (Alexandre Marini)

You example provided of update statistics is probably not the best exam=
ple.

The assumption made is that update statistics of an older Informix serv=
er
is the same
as a new Informix server and that a majority of the time it is doing I/=
O.
Update statistics
has been changed significantly over time and it can end up doing work t=
o
cleanup older
style indexes which are inefficient.

John F. Miller III
STSM, Lead Architect
miller3@us.ibm.com
503-747-1366
IBM Informix Dynamic Server (IDS)

ids-bounces@iiug.org wrote on 05/26/2014 07:26:09 AM:

> From: "Alexandre Marini" <alexandre@briug.org>
> To: ids@iiug.org,
> Date: 05/26/2014 07:27 AM
> Subject: RE: Poor performance on VMWare [33100]
> Sent by: ids-bounces@iiug.org
>
> Hello, Javier.
> My personal opinion is that you might have a better performance, but =
you
> should not use the same onconfig file.
>
> 1) Are you really using cooked files? If so, please forget them. Chan=
ge
your
> chunks to raw devices, and make sure you are not using a bad RAID lev=
el
in
> your storage.
>
> 2) You could start a performance tunning process after topic 1 is sol=
ved.

> Informix 12 have several features that might benefit your
> performance, even in
> VMs environments. Eg: are you using cpu vp memory caches? Are you usi=
ng
RTO
> policies? Are you using alice index cleaner mode (OLTP system)?
>
> 3) You might also check other topics, but as a start phase, I=B4d go =
for
all of
> mentioned ones first.
>
> Hope it helps.
> Regards.
>
> Alexandre Marini
> IBM Informix Certified Professional v10 / v11.50 / v11.70 / v12.10
>
> IBM Information Management Informix Technical Professional
>
> IBM Infosphere DataStage Technical Professional
> Informix Senior DBA - Orizon Brasil
> BRIUG website administrator
> Informix independent consultant
>
> > To: ids@iiug.org
> > From: jperez@uniovi.es
> > Subject: Poor performance on VMWare [33099]
> > Date: Mon, 26 May 2014 09:44:07 -0400
> >
> > Hello
> >
> > I want to know some expert opinion about one IDS 12.10.FC3WE test
> that I ha=3D
> > ve currently executing in two machines. This machines are:
> >
> > SRV1: (+7 years old) HP Proliant DL585 G1
> > - 4xAMD Opteron 820 2.3GHz (2 cores x processor for a total of 8 co=
res)

> > - 16 GB RAM
> > - Local HDD on 146GB Ultra320 SCSI
> > - Informix storage: cooked files
> > - Red Hat 5.9 x64
> >
> > SRV2: VMWare Virtual server
> > - 8xvCPU (reported as AMD Opteron 6176 SE 2,3GHz)
> > - 16 GB RAM
> > - SAN (HP EVA6500) HDD on 2TB 7.2K EVA SAS MDL disk pool (Mapped RA=
W
LUN)
> > - SAN conectivity: 1Gbps iSCSI (server side) 10Gbps (SAN side)
> > - Informix storage: cooked files
> > - Red Hat 6.5 x64
> >
> > With these technical data, I am expected that the SRV2 results
> were better =3D
> > than the SRV2 ones (and more knowing the SRV1 "age").
> >
> > When I ran some scripts, stored procedures (SPL) and update
> statistics, I w=3D
> > as surprised by the results. The massive write operations were
> slightly bet=3D
> > ter on SRV2 (import was 40% faster in SRV2), but the scripts
> envolving heav=3D
> > y reading operations were about 1,5 times slow in the best cases,
> reaching =3D
> > 2,5 times slow in the worse cases.
> >
> > In this unexpected scenario, I looked for an IDS independent
> benchmarking t=3D
> > ool and I found a suite called "phoronix test suite" (PTS). I was
> decided t=3D
> > o find the bottleneck in SRV2... but again the results of the PTS
> surprised=3D
> > me. I ran various test, with the following results:
> >
> > - pts/SmallPT (CPU test. Less is better) > SRV1: 192 > SRV2: 141
(better)
> > - pts/Apache (CPU test. More is better) > SRV1: 7017.65 > SRV2:
> 9547.57 (be=3D
> > tter)
> > - pts/aio-stress (I/O test. Random Write. More is better) > SRV1:
> 22.06 > S=3D
> > RV2: 881.51 (better)
> > - pts/iozone (I/O test. Read Performance: 1MB record / 2GB file.
> More is be=3D
> > tter) > SRV1: 728.09 > SRV2: 2008.14 (better)
> > - pts/iozone (I/O test. Read Performance: 1MB record / 4GB file.
> More is be=3D
> > tter) > SRV1: 824.98 > SRV2: 1985.23 (better)
> > - pts/iozone (I/O test. Read Performance: 1MB record / 8GB file.
> More is be=3D
> > tter) > SRV1: 768.30 > SRV2: 1906.90(better)
> > - pts/iozone (I/O test. Read Performance: 4KB record / 2GB file.
> More is be=3D
> > tter) > SRV1: 1016.75 > SRV2: 2113.92 (better)
> > - pts/iozone (I/O test. Read Performance: 4KB record / 4GB file.
> More is be=3D
> > tter) > SRV1: 1071.86 > SRV2: 1953.93 (better)
> > - pts/iozone (I/O test. Read Performance: 4KB record / 8GB file.
> More is be=3D
> > tter) > SRV1: 1086.07 > SRV2: 1794.42 (better)
> > - pts/iozone (I/O test. Write Performance: 1MB record / 2GB file.
> More is b=3D
> > etter) > SRV1: 25.38 > SRV2: 97.64 (better)
> > - pts/iozone (I/O test. Write Performance: 1MB record / 4GB file.
> More is b=3D
> > etter) > SRV1: 26.28 > SRV2: 114.04 (better)
> > - pts/iozone (I/O test. Write Performance: 1MB record / 8GB file.
> More is b=3D
> > etter) > SRV1: 28.36 > SRV2: 144.49 (better)
> > - pts/iozone (I/O test. Write Performance: 4KB record / 2GB file.
> More is b=3D
> > etter) > SRV1: 26.17 > SRV2: 91.99 (better)
> > - pts/iozone (I/O test. Write Performance: 4KB record / 4GB file.
> More is b=3D
> > etter) > SRV1: 26.35 > SRV2: 108.19 (better)
> > - pts/iozone (I/O test. Write Performance: 4KB record / 8GB file.
> More is b=3D
> > etter) > SRV1: 28.62 > SRV2: 144.37 (better)
> > - pts/ramspeed (RAM test. Add integer. More is better) > SRV1:
> 3533.75 > SR=3D
> > V2: 6782.31 (better)
> > - pts/ramspeed (RAM test. Copy integer. More is better) > SRV1:
> 3418.95 > S=3D
> > RV2: 6782.31 (better)
> > - pts/ramspeed (RAM test. Scale integer. More is better) > SRV1:
> 3448.33 > =3D
> > SRV2: 6776.20 (better)
> > - pts/ramspeed (RAM test. Triad integer. More is better) > SRV1:
> 3499.36 > =3D
> > SRV2: 6536.23 (better)
> > - pts/ramspeed (RAM test. Average integer. More is better) >
SRV1:3453.82 =3D
> > > SRV2: 6851.13 (better)
> > - pts/ramspeed (RAM test. Add floating point. More is better) >
> SRV1: 3955.=3D
> > 16 > SRV2: 7241.65 (better)
> > - pts/ramspeed (RAM test. Copy floating point. More is better) >
> SRV1: 3599=3D
> > ..66 > SRV2: 7178.45 (better)
> > - pts/ramspeed (RAM test. Scale floating point. More is better) >
> SRV1: 339=3D
> > 9.08 > SRV2: 7286.11 (better)
> > - pts/ramspeed (RAM test. Triad floating point. More is better) >
> SRV1: 385=3D
> > 5.18 > SRV2: 7461.69 (better)
> > - pts/ramspeed (RAM test. Average floating point. More is better)
> > SRV1: 3=3D
> > 647.64 > SRV2: 7351.95 (better)
> >
> > In these test, SRV2 outperforms SRV1 in a clear and consistent wayi=
n
any o=3D
> > f the evaluated fields (Processor, I/O and Memory). But the IDS
> 12.10.FC3WE=3D
> > still runs slowly in SRV2 when I execute massive read operations (b=
y
examp=3D
> > le, update statistics over my test db is 136% more slow than the
> same opera=3D
> > tion on SRV1). The IDS config is exactly the same in the two
> servers (oncon=3D
> > fig copied from one to other).
> >
> > One thing I observed is that the SRV2's virtual processors shows
> more activ=3D
> > ity than the SRV1's ones when I execute any IDS operation. Also ist=
he
same=3D
> > thing with the "top" utility in the operating system command line.T=
his
is=3D
> > a "contradiction?" with the SRV2's better PTS CPU tests .
> >
> > I do not identify or suspect any possible reason who explain the
> poor SRV2 =3D
> > performance... any ideas?
> >
> > Thanks in advance and excuse me if the english is not quite good...=
:-(

> >
> > --
> > Javier Perez Arenal - jperez@uniovi.es<mailto:jperez@uniovi.es>
> > Jefe del Area T=3DE9cnica de Inform=3DE1tica y Comunicaciones
> > Vicerrectorado de Campus, Inform=3DE1tica e Infraestructuras
> > Universidad de Oviedo
> > Edificio Severo Ochoa
> > C/ Fernando Bongera s/n, Campus del Cristo
> > 33006 - Oviedo, Asturias
> >
> > --Boundary_(ID_B1ApZu83LpmDOByskPtisQ)
> >
> >
> >
>
***********************************************************************=
********

> > Forum Note: Use "Reply" to post a response in the discussion forum.=

> >
>
>
>
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********

> Forum Note: Use "Reply" to post a response in the discussion forum.=

>=

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