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More efficient unique indexes for monotonically increasing keys and constraints
Currently an index on a SERIAL and other monotonically increasing keys only add to the last node in the index causing the node to split into two half filled nodes. Eventually a sufficient number of nodes have so split that the index's search effic...
Different message when transaction time limit reached
When transaction duration limit is reached the following message occurs in the online log file 08:56:28 sid 11617 - email@example.com - pid 6811 terminated because session transaction duration (60 seconds) has exceeded limit. This session i...
SQLTrace offers the DBA the tooling required to monitor a user session. However its difficult to monitor heavily used systems. For example one needs to have a buffer large enough to store 90 seconds of SQL queries (small lookup SQL's consume the b...
We need to stay with Informix 12 so that our compiled 4GL will continue to work, but we would like to upgrade to RHEL8. Others have done this and it works for them, but my company has to get confirmation that this will be a supported combination f...
Limit open partitions to avoid very large rsam pool
In systems with a lot of tables informix can have a very large rsam pool. This can cause informix to allocate so much memory it starts swapping or in memory limiting versions (like workgroup, express etc.) to even let the engine crash. Sometimes t...
Allow SPL variables to be used to define index directives.
Inside a stored procedure allow the index name for a directive to come from a variable:...define v_bs_index varchar(100);define p_id like tBS.id,...let v_bs_index = ( select cfg from Cfg where group = 'INDEXES' and name = 'TBS_INDEX' )...
Allow Bufferpool Min_lru_dirty and Max_lru_dirty Threshold values to be altered dynamically
onparams -b can be used to add a new bufferpool and AUTO_LRU_TUNING are available on informix server but first only adds a bufferpool of a new page size and the latter only kicks in if some foreground writes occur on a server which ideally is neve...
Allow the option to use LDAP for HQ Authentication. Build the user name in HQ but allow it to use domain authentication. This would also allow HQ to write backups to mapped drives. See Support Case TS007408895 for further details.
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