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Many times a DBA is called to check upon a slow process. Most of the times those processes are running a slow query.Sometimes it's hard to know if the query is using the best query plan or not. A DBA can reproduce the query, but it it was prepared...
Currently the syntax to define a trusted context accepts only IP's . In view that microservices are deployed on Kubernetes infrastructures, the DBA has to add all the IP's of the different subnets. This is both cumbersome and laborious. The propos...
Allow Informix to accept Non PAM aware clients to connect when using PAM PASSWORD mode
Standard Informix Authentication on unix will perform a getpwnam() call to retrieve the encrypted shadow password from the OS, it will then compare an encrypted version of the password supplied by the client against this, and if they match, authe...
Informix has a rows/page limit of 255 rows/page.Perhaps this was not a problem originally but over time we have seen new features:larger page sizes (up to 16 kB against 2 kB or 4 kB previously, dependent on operating system).compression option.Thi...
SQL interface to obtain the temporary space usage (tables, hash, sorts...)
A DBA and possibly a programmer needs an easy way to monitor who is responsible for the temporary space usage.Currently it's possible a user may be consuming a lot of temporary space and impacting other sessions, without the DBA being able to quic...
Add metrics for reverse index scans and number of retries.
As per APAR IT37120: CONCURRENT QUERIES USING REVERSE SCAN OF INDEX WITH MANY DELETEDENTRIES MAY ENCOUNTER POOR PERFORMANCE
reverse index scans can require a retry.
Add metrics for number of reverse scans per partition and number of retries.
Enhance availability of readahead performance details
With the ubiquity of intelligent storage, the value of readahead in the Informix server is reduced and excessive readahead can be detrimental to performance. However, since the introduction of the AUTO_READAHEAD parameter and the associated change...
When we create a view using a sensible-looking query, the database converts it into a version that has lots of extra parentheses and odd-looking table names. Below is an example of one of these converted queries. This is a relatively simple exampl...
For lock spinslocks show if loops are for read or writes
When reviewing onstat -g spi for lock spinlocks e.g.Num Waits Num Loops Avg Loop/Wait Name433407 127960809035 295243.98 fast mutex, lockhashI would be great to know if this access is for reading or writing ...
For buffer spinslocks show if loops are for read or writes
When reviewing onstat -g spi for buffer spinlocks e.g.fast mutex, 3:bffast mutex, 3:bhashIt would be great if we could tell if this is from either:a) Read access i.e. more app caching/better query plans/more data archiving+purgin neededb) W...
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