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18 Nov 13 - ZDNet - Top 20 mobile skills in demand... Read
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2 Aug 12 - channelbiz - Oninit Group launches Pay Per Pulse cloud-based service... Read
28 May 12 - Bloor - David Norfolk on the recent Informix benchmark "pretty impressive results"... Read
23 May 12 - DBTA - Informix Genero: A Way to Modernize Informix 4GL Applications... Read
9 Apr 12 - Mastering Data Management - Upping the Informix Ante: Advanced Data Tools... Read
22 Mar 12 - developerWorks - Optimizing Informix database access... Read
14 Mar 12 - BernieSpang.com - International Informix User Group set to meet in San Diego... Read
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26 Feb 12 - BernieSpan.com - Better results, lower cost for a broad set of new IBM clients and partners... Read
24 Feb 12 - developerWorks - Informix Warehouse Accelerator: Continuous Acceleration during Data Refresh... Read
6 Feb 12 - PRLOG - Informix port delivers unlimited database scalability for popular SaaS application ... Read
2 Feb 12 - developerWorks - Loading data with the IBM Informix TimeSeries Plug-in for Data Studio... Read
1 Feb 12 - developerWorks - 100 Tech Tips, #47: Log-in to Fix Central... Read
13 Jan 12 - MC Press online - Informix Dynamic Server Entices New Users with Free Production Edition ... Read
11 Jan 12 - Computerworld - Ecologic Analytics and Landis+Gyr -- Suitors Decide to Tie the Knot... Read
9 Jan 12 - planetIDS.com - DNS impact on Informix / Impacto do DNS no Informix... Read
8 Sep 11 - TMCnet.com - IBM Offers Database Solution to Enable Smart Meter Data Capture... Read
1 Aug 11 - IBM Data Management Magazine - IIUG user view: Happy 10th anniversary to IBM and Informix... Read
8 Jul 11 - Database Trends and Applications - Managing Time Series Data with Informix... Read
31 May 11 - Smart Grid - The meter data management pitfall utilities are overlooking... Read
27 May 11 - IBM Data Management Magazine - IIUG user view: Big data, big time ( Series data, warehouse acceleration, and 4GLs )... Read
16 May 11 - Business Wire - HiT Software Announces DBMoto for Enterprise Integration, Adds Informix. Log-based Change Data Capture... Read
21 Mar 11 - Yahoo! Finance - IBM and Cable&Wireless Worldwide Announce UK Smart Energy Cloud... Read
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11 Mar 11 - InvestorPlace - It's Time to Give IBM Props: How many tech stocks are up 53% since the dot-com boom?... Read
9 Mar 11 - DBTA - Database Administration and the Goal of Diminishing Downtime... Read
2 Feb 11 - DBTAs - Informix 11.7 Flexible Grid Provides a Different Way of Looking at Database Servers... Read
27 Jan 11 - exactsolutions - Exact to Add Informix Support to Database Replay, SQL Monitoring Solutions... Read
25 Jan 11 - PR Newswire - Bank of China in the UK Works With IBM to Become a Smarter, Greener Bank... Read
12 Oct 10 - Database Trends and Applications - Informix 11.7: The Beginning of the Next Decade of IBM Informix... Read
20 Sep 10 - planetIDS.com - ITG analyst paper: Cost/Benefit case for IBM Informix as compared to Microsoft SQL Server... Read
20 Jul 10 - IBM Announcements - IBM Informix Choice Edition V11.50 helps deploy low-cost scalable and reliable solutions for Apple Macintosh and Microsoft Windows... Read
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20 May 10 - ebiz - IBM Teams With Hildebrand To Bring Smart Metering To Homes Across Britain... Read
19 May 10 - The New Blog Times - Misurare il consumo energetico: DEHEMS è pronto... Read
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17 March 10 - ZDNet (blog) David Morgenstern - TCO: New research finds Macs in the enterprise easier, cheaper to manage than... Read
17 March 2010 - Virtualization Review - ...key components of Big Blue's platform to the commercial cloud such as its WebSphere suite of application ser vers and its DB2 and Informix databases... Read
10 February 2010 - The Wall Street Journal - International Business Machines is expanding an initiative to win over students and professors on its products. How do they lure the college crowd?... Read


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Re: RE: How to tell that client uses SSL conne....
Posted by: srmitin@yahoo.com (SERGIY MITIN) - Tue, 20 Feb 2018 17:52:17 EST
that works, thanks.









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Re: Using complete CPU core instead thread
Posted by: mboncalo@gmail.com (R MICHAEL) - Tue, 20 Feb 2018 17:28:24 EST
Hi Martin,



Thanks for your detailed response.

Why I asked this question? Is because We have lots of CPUs available( real

ones) and I can use only a small percentage because of the 3TB database is

stored on only 2 disks and I can't take advantage of all those CPUs. So I

wanted to use, somehow, the whole CPU core instead of a thread.

I needed to know if I take offline every second CPU thread, the remaining

online thread will have the computation power of the whole CPU core so that I

could use it as Informix VP.



Thank you,

Michael.









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IDS 12.10.FC8 AIX 7.1 VPCLASS autotune=1
Posted by: informixdba@gmail.com (KERNOAL STEPHENS) - Tue, 20 Feb 2018 14:58:15 EST
I am seeing the following in the ONCONFIG.



VPCLASS cpu,num=12,noage,autotune=1

VPCLASS aio,num=2,noage,autotune=1



I don't see autotune documented.



Is this not the same as:

AUTO_AIOVPS 1



Don't see any AUTO_CPUVPS



Thanks

Kernoal









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Re: Using complete CPU core instead thread
Posted by: martin.furderer@hcl.com (Martin Furderer) - Tue, 20 Feb 2018 10:59:28 EST
Hi,



I'm not sure I completely understood the original question.



Anyway, here's some (not too much in-depth) explanation that may be helpful:



Informix has a homegrown implementation of multi threading. (This is mainly

because at the time the Posix thread implementation first was not and then not

widely available on the many different platforms where Informix was running

(Sequent, Iris, Data General Unix, SINIX, to name a few). Furthermore, it is

also of some advantage that this homegrown multi threading is non-preemptive

as this allows thread switches at times when they are opportune and less

costly.)



An Informix Virtual Processor (VP) is a UNIX/Linux process (of the oninit

binary) that normally has several threads, but runs only one of these threads

at a time. Therefore, a single VP will utilize only a single CPU at any one

time. If there are more CPUs available in the system, then the way to make

Informix utilize them is to start more VPs, especially the so-called CPU VPs

as they are doing most of the normal work by running the so-called "sqlexec"

threads. With the threads running in a VP being of the homegrown multi

threading implementation, the OS does not really know about them and therefore

does not schedule them concurrently. The OS only knows about the VPs (that are

processes) and schedules those.



Bringing in the concept of Intel HyperThreading (and very similar also

Simultaneous Multi Threading - SMT - on Power) does not change anything of the

above. With HyperThreading enabled, the OS basically sees two CPUs for every

processor core. Therefore it can schedule twice as many processes

concurrently. In order to fully take advantage of this, one would have to

re-configure Informix to run twice as many processes (i.e. VPs).



Now, thing with HyperThreading (as well as SMT) is, that - obviously - it does

not magically create twice as many "real CPUs". What it does is to offer the

OS the possibility to schedule twice as many processes concurrently ... and

then runs certain operations executed by two concurrent processes in parallel,

taking advantage of arcane details of the processor and system architecture

(instruction execution pipeline, etc.). Therefore, the two processes that are

seemingly running concurrently on the two CPUs that the HyperThreading offers

for the same core ... only run partially in parallel. How well this

pseudo-parallelism works out (i.e. how much performance improvement it

creates) depends a lot on how the application is implemented and therefore

normally cannot be predicted with much accuracy. With an application like the

Informix database server it may even considerably depend on the database

applications.



With all this, it hopefully becomes a bit clearer that and why:



- a single Informix VP does not utilize two CPUs concurrently as it is a

single process from the perspective of the OS.



- the Informix affinity configuration cannot make a single VP to utilize two

CPUs concurrently. (Binding a VP to one or several CPUs basically tells the OS

to restrict the scheduling of the process to the specified CPUs.)



- switching on HyperThreading does not automatically double the performance.



- with HyperThreading active, Informix probably should be re-configured to run

more (CPU) VPs in order to take advantage of the HyperThreading.



- doubling the number of Informix VPs for HyperThreading probably is not the

ideal configuration because the processes only run partially in parallel.

Doubling the number of VPs may well overload the system and thus cause some

negative effect on performance.



- the ideal Informix configuration for a system with HyperThreading should be

determined by careful tuning of the individual system using the intended

workload.



Regards, Martin

--

Martin Fuerderer

Informix Development Germany



e-mail: martin.furderer@hcl.com



HCL Technologies Germany GmbH

Frankfurter Ring 17

80807 Munich, Germany

http://www.hcltech.com/de



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________________________________

From: ids-bounces@iiug.org <ids-bounces@iiug.org> on behalf of R MICHAEL

<mboncalo@gmail.com>

Sent: Tuesday, February 20, 2018 14:58

To: ids@iiug.org

Subject: Re: Using complete CPU core instead thread [40717]



Hi Benjamin,



I forgot those important details:

I use Linux on Intel.

Unfortunately I don't have where to test so I tried to ask here



Thank you.











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Re: Using complete CPU core instead thread
Posted by: mboncalo@gmail.com (R MICHAEL) - Tue, 20 Feb 2018 08:58:56 EST
Hi Benjamin,



I forgot those important details:

I use Linux on Intel.

Unfortunately I don't have where to test so I tried to ask here



Thank you.









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error on OAT using informix 12.10 FC8
Posted by: lpolicarpio2009@yahoo.com (LESTER POLICARPIO) - Mon, 19 Feb 2018 21:34:58 EST
Hi,



I encountered an error when trying to access the alerts link in OAT web with

error below...



[Informix][Informix ODBC Driver][Informix]Unspecified System Error = -9272.

sqlerrm(bigint) (SQLPrepare[-9272] at

...\pecl\pdo_informix\informix_driver.c:131)



Query:

select FIRST 25 trim(lower(alert_color)) as alert_color, alert_type, alert_id,

alert_message, alert_time, trim(alert_state) as alert_state,

alert_action,trim(alert_object_type) as alert_object_type, alert_object_info,

trim(task_name) as task_name FROM ph_alerts WHERE UPPER(alert_color) IN (

'RED', 'YELLOW', 'GREEN' ) AND UPPER(alert_type) IN ( 'ERROR', 'WARNING',

'INFO' ) AND UPPER(alert_state) IN ( 'NEW', ' ', ' ', ' ' ) ORDER BY

alert_time DESC



Isn't 12.10 supported by the Open Admin Tool or is there a new version of OAT

that I need to install?



Thanks,









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Re: Using complete CPU core instead thread
Posted by: benjamin.thompson@skybettingandgaming.com (BENJAMIN THOMPSON) - Mon, 19 Feb 2018 15:49:46 EST
Are you using Linux on Intel? In which case, hyper-threading manifests itself

as two different core numbers (check /proc/cpuinfo) which you can use with

affinity. However you'd need to test whether having two CPU VPs per core in

this way is faster than one.



If not, what platform (OS and hardware combination) are you using?



Ben.









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Re: Waits on the physical log buffer in v12.10
Posted by: domusonline@gmail.com (Fernando Nunes) - Mon, 19 Feb 2018 11:19:48 EST
Sounds possible. You don't happen to have any FC10?



On Mon, Feb 19, 2018 at 4:17 PM, BENJAMIN THOMPSON <

benjamin.thompson@skybettingandgaming.com> wrote:



> BTree scanner is a good candidate and would explain the seemingly random

> nature of the problem since we haven't been looking at that explicitly. The

> difference between 12.10.FC10X1 and 12.10.FC10 is a patch that means the

> scanner is cleaning non-default page sizes properly, which apparently

> previous

> versions including all 11.70 did not do. This might be making it more

> aggressive.

>

> Ben.

>

>

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

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

>

>

>



--

Fernando Nunes

Portugal



http://informix-technology.blogspot.com

My email works... but I don't check it frequently...









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Re: Waits on the physical log buffer in v12.10
Posted by: benjamin.thompson@skybettingandgaming.com (BENJAMIN THOMPSON) - Mon, 19 Feb 2018 11:17:19 EST
BTree scanner is a good candidate and would explain the seemingly random

nature of the problem since we haven't been looking at that explicitly. The

difference between 12.10.FC10X1 and 12.10.FC10 is a patch that means the

scanner is cleaning non-default page sizes properly, which apparently previous

versions including all 11.70 did not do. This might be making it more

aggressive.



Ben.









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Re: Waits on the physical log buffer in v12.10
Posted by: david@smooth1.co.uk (david@smooth1.co.uk) - Mon, 19 Feb 2018 10:11:58 EST
http://members.iiug.org/forums/ids/index.cgi/read/35233 has a similar stack

and mentions checking



- BT Scanner

- HDR back pressure (some form of secondary in use?)



Regards,

David.



> On 19 February 2018 at 14:48 BENJAMIN THOMPSON

<benjamin.thompson@skybettingandgaming.com> wrote:

>

>

> Hi David,

>

> Presumably you are following

> http://www-01.ibm.com/support/docview.wss?uid=swg21653615

>

> I think the stack you want is below.

>

> Ben.

>

> Stack for thread: 10250890 sqlexec

> base: 0x0000000a8345f000

> len: 151552

>

> pc: 0x000000000140e8d6

> tos: 0x0000000a8347ffd0

> state: mutex wait

>

> vp: 10

>

> 0x000000000140e8d6 (/opt/informix/bin/oninit) yield_processor_mvp

> 0x000000000141ac0e (/opt/informix/bin/oninit) mt_lock_wait

> 0x000000000141c240 (/opt/informix/bin/oninit) mt_lock_helper

> 0x0000000000d9579a (/opt/informix/bin/oninit) bfphysflush

> 0x0000000000d9648e (/opt/informix/bin/oninit) bfphyslogx

> 0x0000000000d6e470 (/opt/informix/bin/oninit) btadditem

> 0x0000000000d7003f (/opt/informix/bin/oninit) rsbtadditem

> 0x00000000014f4d1b (/opt/informix/bin/oninit) fm_idxinsert

> 0x00000000014cd8a2 (/opt/informix/bin/oninit) fmwrite

> 0x00000000006c5332 (/opt/informix/bin/oninit) aud_sqiswrite

> 0x000000000088890f (/opt/informix/bin/oninit) chkrowcons

> 0x0000000000827d60 (/opt/informix/bin/oninit) addone

> 0x000000000082c7b9 (/opt/informix/bin/oninit) insone_next

> 0x0000000000894907 (/opt/informix/bin/oninit) doinsert

> 0x00000000005d2dd8 (/opt/informix/bin/oninit) excommand

> 0x000000000068beea (/opt/informix/bin/oninit) ip_evalsql

> 0x000000000069862d (/opt/informix/bin/oninit) runproc

> 0x00000000006995b0 (/opt/informix/bin/oninit) udrlm_spl_execute

> 0x0000000000a562fe (/opt/informix/bin/oninit) udrlm_exec_routine

> 0x00000000006d429c (/opt/informix/bin/oninit) udr_execute

> 0x000000000069a2bf (/opt/informix/bin/oninit) ip_curnext

> 0x000000000069b361 (/opt/informix/bin/oninit) ip_fetch

> 0x00000000007fb958 (/opt/informix/bin/oninit) getrow

> 0x00000000007fc1e8 (/opt/informix/bin/oninit) fetchrow

> 0x00000000005cf628 (/opt/informix/bin/oninit) exfetch

> 0x0000000000a17450 (/opt/informix/bin/oninit) sql_nfetch

> 0x0000000000a17a3b (/opt/informix/bin/oninit) sq_nfetch

> 0x0000000000adfb43 (/opt/informix/bin/oninit) sqmain

> 0x000000000151c32b (/opt/informix/bin/oninit) spawn_thread

> 0x00000000013e1d30 (/opt/informix/bin/oninit) th_init_initgls

> 0x000000000144aac8 (/opt/informix/bin/oninit) startup

>

>

>



>

>









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Re: Waits on the physical log buffer in v12.10
Posted by: domusonline@gmail.com (Fernando Nunes) - Mon, 19 Feb 2018 09:50:12 EST
I haven't seen this yet, but most customers didn't move yet.

The one thing that comes to mind is the new index usage tracking feature...

But that doesn't map perfectly with "INSERT" operations. However, the new

data is stored in the partition header which needs to be changed on every

INSERT/DELETE....



I expressed some concerns about these new feature. Acknowledging of course

that it's very useful...

I would suggest a ticket...



Regards.



On Mon, Feb 19, 2018 at 1:54 PM, BENJAMIN THOMPSON <

benjamin.thompson@skybettingandgaming.com> wrote:



> Hi,

>

> Since an upgrade to 12.10.FC10X1 (from 11.70) we are seeing a lot more

> waits

> on the physical log buffer. These waits don't seem to align with any

> business

> or general server activity. These manifest themselves as a mutex wait:

>

> onstat -s:

>

> Latches with lock or userthread set

> name address lock wait userthread

> physlog 4445b258 0 3fd4dcb50 868b08028

> physb1 4445b2d8 0 868b08028 abefacb60

> physb2 4445b3e0 0 0 868b08028

>

> onstat -g lmx:

>

> Locked mutexes:

> mid addr name holder lkcnt waiter waittime

> 13484 4445b258 plogpl 10250890 0 10257705 8

>

> 10218244 8

>

> 10258577 8

>

> 10155091 8

>

> 10263606 8

> [snip long list of waiters]

>

> We also see a lot of buffer waits, nearly all with pgflgs "890" which

> indicates:

> 800 - Physical log

> 80 - B-tree leaf-node page

> 10 - B-tree node page

>

> This problem did not exist to anything like the same extent in 11.70 and we

> have logging and diagnostics that demonstrate this.

>

> When we drill into what the userthread or holder of the mutex is doing, it

> is

> invariably an insert into a reasonably busy log table. However we believe

> that

> this thread is a "victim" of a wider server issue rather than the cause.

>

> Storage performance has been suspected and we have occasionally seen slight

> increases in write times (maximum 12 ms) around the problem but not always.

>

> Since the 11.70 upgrade all of the pre-existing parameters were largely

> untouched and we have increased PHYSBUFF to 2048 (from 512) to little or no

> effect.

>

> I noted Art's RFE around LOGBUFF and increasing the number of buffers.

> Could

> this be related?

>

> Ben.

>

>

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

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

>

>

>



--

Fernando Nunes

Portugal



http://informix-technology.blogspot.com

My email works... but I don't check it frequently...









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Re: Waits on the physical log buffer in v12.10
Posted by: benjamin.thompson@skybettingandgaming.com (BENJAMIN THOMPSON) - Mon, 19 Feb 2018 09:48:01 EST
Hi David,



Presumably you are following

http://www-01.ibm.com/support/docview.wss?uid=swg21653615



I think the stack you want is below.



Ben.



Stack for thread: 10250890 sqlexec

base: 0x0000000a8345f000

len: 151552



pc: 0x000000000140e8d6

tos: 0x0000000a8347ffd0

state: mutex wait



vp: 10



0x000000000140e8d6 (/opt/informix/bin/oninit) yield_processor_mvp

0x000000000141ac0e (/opt/informix/bin/oninit) mt_lock_wait

0x000000000141c240 (/opt/informix/bin/oninit) mt_lock_helper

0x0000000000d9579a (/opt/informix/bin/oninit) bfphysflush

0x0000000000d9648e (/opt/informix/bin/oninit) bfphyslogx

0x0000000000d6e470 (/opt/informix/bin/oninit) btadditem

0x0000000000d7003f (/opt/informix/bin/oninit) rsbtadditem

0x00000000014f4d1b (/opt/informix/bin/oninit) fm_idxinsert

0x00000000014cd8a2 (/opt/informix/bin/oninit) fmwrite

0x00000000006c5332 (/opt/informix/bin/oninit) aud_sqiswrite

0x000000000088890f (/opt/informix/bin/oninit) chkrowcons

0x0000000000827d60 (/opt/informix/bin/oninit) addone

0x000000000082c7b9 (/opt/informix/bin/oninit) insone_next

0x0000000000894907 (/opt/informix/bin/oninit) doinsert

0x00000000005d2dd8 (/opt/informix/bin/oninit) excommand

0x000000000068beea (/opt/informix/bin/oninit) ip_evalsql

0x000000000069862d (/opt/informix/bin/oninit) runproc

0x00000000006995b0 (/opt/informix/bin/oninit) udrlm_spl_execute

0x0000000000a562fe (/opt/informix/bin/oninit) udrlm_exec_routine

0x00000000006d429c (/opt/informix/bin/oninit) udr_execute

0x000000000069a2bf (/opt/informix/bin/oninit) ip_curnext

0x000000000069b361 (/opt/informix/bin/oninit) ip_fetch

0x00000000007fb958 (/opt/informix/bin/oninit) getrow

0x00000000007fc1e8 (/opt/informix/bin/oninit) fetchrow

0x00000000005cf628 (/opt/informix/bin/oninit) exfetch

0x0000000000a17450 (/opt/informix/bin/oninit) sql_nfetch

0x0000000000a17a3b (/opt/informix/bin/oninit) sq_nfetch

0x0000000000adfb43 (/opt/informix/bin/oninit) sqmain

0x000000000151c32b (/opt/informix/bin/oninit) spawn_thread

0x00000000013e1d30 (/opt/informix/bin/oninit) th_init_initgls

0x000000000144aac8 (/opt/informix/bin/oninit) startup









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Re: Waits on the physical log buffer in v12.10
Posted by: david@smooth1.co.uk (david@smooth1.co.uk) - Mon, 19 Feb 2018 09:11:02 EST
Can you post a thread stack from onstat -g stk?



Regards,

David.



> On 19 February 2018 at 13:54 BENJAMIN THOMPSON

<benjamin.thompson@skybettingandgaming.com> wrote:

>

>

> Hi,

>

> Since an upgrade to 12.10.FC10X1 (from 11.70) we are seeing a lot more waits

> on the physical log buffer. These waits don't seem to align with any

business

> or general server activity. These manifest themselves as a mutex wait:

>

> onstat -s:

>

> Latches with lock or userthread set

> name address lock wait userthread

> physlog 4445b258 0 3fd4dcb50 868b08028

> physb1 4445b2d8 0 868b08028 abefacb60

> physb2 4445b3e0 0 0 868b08028

>

> onstat -g lmx:

>

> Locked mutexes:

> mid addr name holder lkcnt waiter waittime

> 13484 4445b258 plogpl 10250890 0 10257705 8

>

> 10218244 8

>

> 10258577 8

>

> 10155091 8

>

> 10263606 8

> [snip long list of waiters]

>

> We also see a lot of buffer waits, nearly all with pgflgs "890" which

> indicates:

> 800 - Physical log

> 80 - B-tree leaf-node page

> 10 - B-tree node page

>

> This problem did not exist to anything like the same extent in 11.70 and we

> have logging and diagnostics that demonstrate this.

>

> When we drill into what the userthread or holder of the mutex is doing, it

is

> invariably an insert into a reasonably busy log table. However we believe

that

> this thread is a "victim" of a wider server issue rather than the cause.

>

> Storage performance has been suspected and we have occasionally seen slight

> increases in write times (maximum 12 ms) around the problem but not always.

>

> Since the 11.70 upgrade all of the pre-existing parameters were largely

> untouched and we have increased PHYSBUFF to 2048 (from 512) to little or no

> effect.

>

> I noted Art's RFE around LOGBUFF and increasing the number of buffers. Could

> this be related?

>

> Ben.

>

>

>



>

>









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Waits on the physical log buffer in v12.10
Posted by: benjamin.thompson@skybettingandgaming.com (BENJAMIN THOMPSON) - Mon, 19 Feb 2018 08:54:21 EST
Hi,



Since an upgrade to 12.10.FC10X1 (from 11.70) we are seeing a lot more waits

on the physical log buffer. These waits don't seem to align with any business

or general server activity. These manifest themselves as a mutex wait:



onstat -s:



Latches with lock or userthread set

name address lock wait userthread

physlog 4445b258 0 3fd4dcb50 868b08028

physb1 4445b2d8 0 868b08028 abefacb60

physb2 4445b3e0 0 0 868b08028



onstat -g lmx:



Locked mutexes:

mid addr name holder lkcnt waiter waittime

13484 4445b258 plogpl 10250890 0 10257705 8



10218244 8



10258577 8



10155091 8



10263606 8

[snip long list of waiters]



We also see a lot of buffer waits, nearly all with pgflgs "890" which

indicates:

800 - Physical log

80 - B-tree leaf-node page

10 - B-tree node page



This problem did not exist to anything like the same extent in 11.70 and we

have logging and diagnostics that demonstrate this.



When we drill into what the userthread or holder of the mutex is doing, it is

invariably an insert into a reasonably busy log table. However we believe that

this thread is a "victim" of a wider server issue rather than the cause.



Storage performance has been suspected and we have occasionally seen slight

increases in write times (maximum 12 ms) around the problem but not always.



Since the 11.70 upgrade all of the pre-existing parameters were largely

untouched and we have increased PHYSBUFF to 2048 (from 512) to little or no

effect.



I noted Art's RFE around LOGBUFF and increasing the number of buffers. Could

this be related?



Ben.









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Using complete CPU core instead thread
Posted by: mboncalo@gmail.com (R MICHAEL) - Sun, 18 Feb 2018 12:45:59 EST
Hi,

is it possible to configure informix to use the whole core per VP instead of

only one thread using affinity ?

Let's say that now we have cpu=6,aff=(0-5),noage

Condidering that there are 2 threads per core, if I configure informix to use

only one thread per core, would it use the whole core ?

For example:

cpu=6,aff=(0-10/2),noage



or the other thread would be used sometimes by another application on the

machine

Or bring offline the every second cpu thread of the core that has a thread

attached to informix VP ?



Thank you.









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FC10AEE doubts
Posted by: psyclone2004@yahoo.com (MARCUS ALVIN) - Sat, 17 Feb 2018 04:43:15 EST
Hi,

I have to upgrade few informix servers from FC7AEE to FC10AEE.

What I noticed is that FC7 package is a lot bigger than FC10, FC7 being 528 MB

and FC10 384 MB. After a comparison of the files I saw that all the

files/folders from FC7 are bigger and FC7 package also has

IBM_Data_Server_Driver_Package which FC10 does not.

Isn't the new version supposed to have a bigger size ?



FC10AEE was downloaded from IBM Fix Central.



Thank you.









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Re: Remote database access
Posted by: smiley73@gmail.com (Keith Simmons) - Fri, 16 Feb 2018 16:50:18 EST
Kenneth



Many moons ago I successfully used freeTDS and unixODBC for this purpose.

Not used for large numbers of users but it worked and was free :-)

Set up is by command line editing of unix text files, but not unduly

difficult. Web sites for both products seem to be active and up-to-date,

might be worth investigating.

I have also used Gateway Manager, which again, works, but is just as

difficult to set up and expensive (if memory serves).



Keith



On 16 February 2018 at 18:35, Spokey Wheeler <spokey.wheeler@gmail.com>

wrote:



> Sent from my iPad

>

> Hi Kenneth,

>

> Long time no see! Informix enterprise gateway manager should do that for

> you.

>

> > On 16 Feb 2018, at 10:04, KENNETH PENZA <kenneth.penza@gov.mt> wrote:

> >

> > Good morning,

> >

> > Currently we are running Informix 12.10.FC7 on RHEL7. An application

> requires

> > to access tables on an MSSQL server. Within MSSQL a linked server can be

> used

> > to access Informix. Is there a way to do it the other way round?

> >

> > The idea is that from the Informix database I access the MSSQL tables.

> >

> > Regards

> > Kenneth

> >

> >

> >

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

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

> >

> >

>

>

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

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

>

>

>









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Re: Remote database access
Posted by: spokey.wheeler@gmail.com (Spokey Wheeler) - Fri, 16 Feb 2018 13:35:50 EST
Sent from my iPad



Hi Kenneth,



Long time no see! Informix enterprise gateway manager should do that for you.



> On 16 Feb 2018, at 10:04, KENNETH PENZA <kenneth.penza@gov.mt> wrote:

>

> Good morning,

>

> Currently we are running Informix 12.10.FC7 on RHEL7. An application

requires

> to access tables on an MSSQL server. Within MSSQL a linked server can be

used

> to access Informix. Is there a way to do it the other way round?

>

> The idea is that from the Informix database I access the MSSQL tables.

>

> Regards

> Kenneth

>

>

>



>

>









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RE: How to tell that client uses SSL connection?
Posted by: paul@oninit.com (Paul Watson) - Fri, 16 Feb 2018 13:25:51 EST
Try onstat -g ntu



-----Original Message-----

From: ids-bounces@iiug.org [mailto:ids-bounces@iiug.org] On Behalf Of SERGIY

MITIN

Sent: Friday, February 16, 2018 11:57 AM

To: ids@iiug.org

Subject: How to tell that client uses SSL connection? [40702]



We are in process of migration from soctcp to socssl connections and I

cannot

find any onstat command (or anything else) that can tell me what connection

is

used by client: secured or not.



Any ideas ?



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***











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How to tell that client uses SSL connection?
Posted by: srmitin@yahoo.com (SERGIY MITIN) - Fri, 16 Feb 2018 12:57:00 EST
We are in process of migration from soctcp to socssl connections and I cannot

find any onstat command (or anything else) that can tell me what connection is

used by client: secured or not.



Any ideas ?









* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *



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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *

We are in process of migration from soctcp to socssl connections and I cannot

find any onstat command (or anything else) that can tell me what connection is

used by client: secured or not.



Any ideas ?









* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *



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