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IDS Forum

RE: Poor performance on VMWare

Posted By: Alexandre Marini
Date: Monday, 26 May 2014, at 10:26 a.m.

In Response To: Poor performance on VMWare (JAVIER PEREZ ARENAL)

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. Change your chunks to raw devices, and make sure you are not using a bad RAID level in your storage.

2) You could start a performance tunning process after topic 1 is solved. Informix 12 have several features that might benefit your performance, even in VMs environments. Eg: are you using cpu vp memory caches? Are you using RTO policies? Are you using alice index cleaner mode (OLTP system)?

3) You might also check other topics, but as a start phase, IŽd 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=
> 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 cores)
> - 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 RAW 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 =
> than the SRV2 ones (and more knowing the SRV1 "age").
>
> When I ran some scripts, stored procedures (SPL) and update statistics, I w=
> as surprised by the results. The massive write operations were slightly bet=
> ter on SRV2 (import was 40% faster in SRV2), but the scripts envolving heav=
> y reading operations were about 1,5 times slow in the best cases, reaching =
> 2,5 times slow in the worse cases.
>
> In this unexpected scenario, I looked for an IDS independent benchmarking t=
> ool and I found a suite called "phoronix test suite" (PTS). I was decided t=
> o find the bottleneck in SRV2... but again the results of the PTS surprised=
> 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=
> tter)
> - pts/aio-stress (I/O test. Random Write. More is better) > SRV1: 22.06 > S=
> RV2: 881.51 (better)
> - pts/iozone (I/O test. Read Performance: 1MB record / 2GB file. More is be=
> tter) > SRV1: 728.09 > SRV2: 2008.14 (better)
> - pts/iozone (I/O test. Read Performance: 1MB record / 4GB file. More is be=
> tter) > SRV1: 824.98 > SRV2: 1985.23 (better)
> - pts/iozone (I/O test. Read Performance: 1MB record / 8GB file. More is be=
> tter) > SRV1: 768.30 > SRV2: 1906.90(better)
> - pts/iozone (I/O test. Read Performance: 4KB record / 2GB file. More is be=
> tter) > SRV1: 1016.75 > SRV2: 2113.92 (better)
> - pts/iozone (I/O test. Read Performance: 4KB record / 4GB file. More is be=
> tter) > SRV1: 1071.86 > SRV2: 1953.93 (better)
> - pts/iozone (I/O test. Read Performance: 4KB record / 8GB file. More is be=
> tter) > SRV1: 1086.07 > SRV2: 1794.42 (better)
> - pts/iozone (I/O test. Write Performance: 1MB record / 2GB file. More is b=
> etter) > SRV1: 25.38 > SRV2: 97.64 (better)
> - pts/iozone (I/O test. Write Performance: 1MB record / 4GB file. More is b=
> etter) > SRV1: 26.28 > SRV2: 114.04 (better)
> - pts/iozone (I/O test. Write Performance: 1MB record / 8GB file. More is b=
> etter) > SRV1: 28.36 > SRV2: 144.49 (better)
> - pts/iozone (I/O test. Write Performance: 4KB record / 2GB file. More is b=
> etter) > SRV1: 26.17 > SRV2: 91.99 (better)
> - pts/iozone (I/O test. Write Performance: 4KB record / 4GB file. More is b=
> etter) > SRV1: 26.35 > SRV2: 108.19 (better)
> - pts/iozone (I/O test. Write Performance: 4KB record / 8GB file. More is b=
> etter) > SRV1: 28.62 > SRV2: 144.37 (better)
> - pts/ramspeed (RAM test. Add integer. More is better) > SRV1: 3533.75 > SR=
> V2: 6782.31 (better)
> - pts/ramspeed (RAM test. Copy integer. More is better) > SRV1: 3418.95 > S=
> RV2: 6782.31 (better)
> - pts/ramspeed (RAM test. Scale integer. More is better) > SRV1: 3448.33 > =
> SRV2: 6776.20 (better)
> - pts/ramspeed (RAM test. Triad integer. More is better) > SRV1: 3499.36 > =
> SRV2: 6536.23 (better)
> - pts/ramspeed (RAM test. Average integer. More is better) > SRV1: 3453.82 =
> > SRV2: 6851.13 (better)
> - pts/ramspeed (RAM test. Add floating point. More is better) > SRV1: 3955.=
> 16 > SRV2: 7241.65 (better)
> - pts/ramspeed (RAM test. Copy floating point. More is better) > SRV1: 3599=
> ..66 > SRV2: 7178.45 (better)
> - pts/ramspeed (RAM test. Scale floating point. More is better) > SRV1: 339=
> 9.08 > SRV2: 7286.11 (better)
> - pts/ramspeed (RAM test. Triad floating point. More is better) > SRV1: 385=
> 5.18 > SRV2: 7461.69 (better)
> - pts/ramspeed (RAM test. Average floating point. More is better) > SRV1: 3=
> 647.64 > SRV2: 7351.95 (better)
>
> In these test, SRV2 outperforms SRV1 in a clear and consistent way in any o=
> f the evaluated fields (Processor, I/O and Memory). But the IDS 12.10.FC3WE=
> still runs slowly in SRV2 when I execute massive read operations (by examp=
> le, update statistics over my test db is 136% more slow than the same opera=
> tion on SRV1). The IDS config is exactly the same in the two servers (oncon=
> fig copied from one to other).
>
> One thing I observed is that the SRV2's virtual processors shows more activ=
> ity than the SRV1's ones when I execute any IDS operation. Also is the same=
> thing with the "top" utility in the operating system command line. This is=
> a "contradiction?" with the SRV2's better PTS CPU tests .
>
> I do not identify or suspect any possible reason who explain the poor SRV2 =
> 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=E9cnica de Inform=E1tica y Comunicaciones
> Vicerrectorado de Campus, Inform=E1tica 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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