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https://www.ibm.com/support/knowledgecenter/SSGU8G_11.70.0/com.ibm.adref.doc/ids_adr_1100.htm
Table 1. What's New in IBM Informix Administrator's Reference for Version 11.70.xC8; Overview Reference; New event alarm for network failures. The event alarm 84001 appears if the database server cannot bind to the port that is listed in the sqlhosts file. Event alarm 84001 has a severity of 3 and is accompanied by an assertion warning in the online log file.
https://www.ibm.com/support/knowledgecenter/en/SSGU8G_12.1.0/com.ibm.perf.doc/ids_prf_130.htm
Virtual portion of shared memory Informix uses the virtual portion of shared memory to allocate memory to each database server subsystem, as needed. Message portion of shared memory The message portion of shared memory contains the message buffers …
http://www-01.ibm.com/support/docview.wss?uid=swg21207356
This document explains what is a shared memory dump generated by a IBM® Informix® Dynamic Server ... An IBM® Informix® Dynamic Server shared memory dump is a file that contains a complete copy of the shared memory used by IDS instance. ... it provides valuable diagnostic information for technical support analysts.
http://www-01.ibm.com/support/docview.wss?uid=swg21386337
Due to this feature, IBM Informix applications or utilities might unpredictably fail to connect to an IBM® Informix® Dynamic Server (IDS) instance because shmat() will fail to attach to shared memory at the configured location.
One solution is not to use shared memory connections (ipcshm) but streams pipes (ipcstr) if you have them, or tcp/ip (tlitcp or soctcp). It is the recommended way. Despite what the manual says, ipcshm is not always faster, it depends on the OS.
https://groups.google.com/d/topic/comp.databases.informix/1IAKXQJME2k
Nov 16, 2009 · When I am trying to start informix server the following massage apears: shared memory not initialized for INFORMIXSERVER. Any idea?????
https://docs.microsoft.com/en-us/sql/tools/configuration-manager/creating-a-valid-connection-string-using-shared-memory-protocol
Creating a Valid Connection String Using Shared Memory Protocol. 03/14/2017; 2 minutes to read +1; In this article. APPLIES TO: SQL Server (Windows only) Azure SQL Database Azure Synapse Analytics (SQL DW) Parallel Data Warehouse Connections to Microsoft SQL Server from a client running on the same computer use the shared memory protocol.
https://serverfault.com/questions/351392/informix-fatal-error-in-shared-memory-creation
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https://www.ibm.com/support/knowledgecenter/en/SSGU8G_11.50.0/com.ibm.admin.doc/ids_admin_0133.htm
Shared-memory communication is also vulnerable to programming errors if the client application performs explicit memory addressing or over-indexes data arrays. Such errors do not affect the database server if you use network communication or stream pipes. For an example of a shared-memory connection, see A shared-memory connection (UNIX).
http://www-01.ibm.com/support/docview.wss?uid=swg21386337
Due to this feature, IBM Informix applications or utilities might unpredictably fail to connect to an IBM® Informix® Dynamic Server (IDS) instance because shmat() will fail to attach to shared memory at the configured location.
https://www.ibm.com/support/knowledgecenter/en/SSGU8G_12.1.0/com.ibm.perf.doc/ids_prf_130.htm
Virtual portion of shared memory Informix uses the virtual portion of shared memory to allocate memory to each database server subsystem, as needed. Message portion of shared memory The message portion of shared memory contains the message buffers that the shared-memory communication interface uses.
https://www.ibm.com/support/knowledgecenter/SSGU8G_11.70.0/com.ibm.adref.doc/ids_adr_1100.htm
Use the SDS_LOGCHECK configuration parameter to prevent a shared-disk (SD) secondary server from taking over the role of the primary server. Failover to the SD secondary server is initiated if the primary server is inactive, and is not allowed if the primary server is active.
http://www.databaseteam.org/6-informix/1729880438b277e8.htm
The maxpdqpriority is set to 100 in the server. I've set the pdqpriority to 100 in the application by ... Cannot support multiple connections over shared memory. ... > >ERROR MESSAGE: Cannot support multiple connections over shared memory.
http://www-01.ibm.com/support/docview.wss?uid=swg21153588
How to allocate a large memory space for Informix shared memory segments on Red Hat ... If this is not enough shared memory you can increase it by telling the database server to start shared memory at an address higher than the highest memory address used for shared libraries. ... More support for: Informix Servers. Software version: 9.3, 9.4 ...
https://groups.google.com/d/topic/comp.databases.informix/1IAKXQJME2k
Nov 16, 2009 · When I am trying to start informix server the following massage apears: shared memory not initialized for INFORMIXSERVER. Any idea????? Re: shered memory not initialized for INFORMIXSERVER ... 20:34:23 Informix Dynamic Server Initialized -- Shared Memory Initialized. 20:34:23 Physical Recovery Started.
Since Informix PHP API do not close non-persistent connections in ifx_Close but rather at the end of script, Informix client functions fail on a second connection attempt when shared memory connections are used with error -27000 Cannot support multiple connections over shared memory. Try this script to see the problem.
https://serverfault.com/questions/351392/informix-fatal-error-in-shared-memory-creation
Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share …
http://www-01.ibm.com/support/docview.wss?uid=swg27049036
Informix Server provides periodic fixes for release12.10. The following list is the most recent report of fixes for customer-reported defects in Version 12.10.xC8. This report combines both Windows- and UNIX-specific defect fixes, and is more current than the defect information included in the product release.
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