BlockLogXmit status
Amit Patel saw BlockLogXmit on the primary roughly every three months, needing an RSS restart (14.10.FC6X3). Marcus Haarmann cited APAR IT45413, fixed in 14.10.FC11, which Andreas Legner confirmed. Benjamin Thompson said it occurs when the RSS read or write counter in onstat -g smx ses hits 2^32, so restarts can be scheduled. Art Kagel advised upgrading.
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| view attached (2) Dear All, Happy New Year to All. I'm working on Informix 14 on Solaris 5. We get one issue mostly in every 3 months around for replication issue between Primary Server and RSS server and get the status on Primary server as "BlockLogXmit" and we need to restart the RSS node, and it impact the application connected with the RSS node. How can we avoid these situation? in 2025 we faced this situation around 4 times. Kindly suggest. Thanks Amit Patel ------------------------------ AMIT PATEL ------------------------------
Hi Which release of 14 are you running? We use 14.10.FC11 and see this issue with some of our installations. I assumed it was fixed in FC12 but can't find an exact match in the release notes.
APAR IT45413, solved in 14.10 xC11 according to the documentation https://www.ibm.com/mysupport/s/defect/aCI3p000000LIbU/dt260248?language=en_US
Dear Stuart, Currently we are using Informix 14.10.FC6X3 Regards Amit Patel ------------------------------ AMIT PATEL ------------------------------
Amit and Stuart,
This support article doesn't mention that this issue doesn't happen randomly. It happens when the number of reads (or possibly writes) on the RSS shown by 'onstat -g smx ses' reaches 4,294,967,296 (2^32). 'onstat -z' won't help here. Therefore you will only see this on busier systems and at fairly regular intervals in time, dependent on activity. Knowing this you can monitor it and schedule a restart at a more convenient time.
Ben.
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Benjamin Thompson
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As already stated by Marcus, this is a known defect that is fixed from 14.10.FC11 onwards. ------------------------------ Andreas Legner Informix Dev HCL Software ------------------------------
Amit: Besides the bug fixes, there were important performance enhancements to RSS in later releases. Upgrade! Art Art S. Kagel, President and Principal Consultant ASK Database Management www.askdbmgt.com Blog: http://informix-myview.blogspot.com/ Disclaimer: Please keep in mind that my own opinions are my own opinions and do not reflect on the IIUG, nor any other organization with which I am associated either explicitly, implicitly, or by inference. Neither do those opinions reflect those of other individuals affiliated with any entity with which I am affiliated nor those of the entities themselves.