kdb+ and q
Q+A on all things kdb+ database and the q language
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Orphan memory in KDB process using Rserve

Hi Everyone, our team is one of the users of Rserve for integrating KDB with R. Recently we noticed that one of our processes working with a R server was bloating in memory. Oddly, the .Q.w did not show any bloating in memory and .Q.gc didnt release ...

Resolved! KDB+ and hyperthreading

I'm looking for information regarding hyperthreading with kdb+, main questions below 1) Does it cause any issues when enabled? 2) Does it impact the license in any way. 3) Are there any types of queries or operations which benefit from it being enabl...

jlucid by New Contributor III
  • 2 replies
  • 1 kudos

Type error from Q chk

Does anyone kwon how to solve/fix type error from .Q.chk? how to check which files could have issue? Thanks

renbright by New Contributor II
  • 2 replies
  • 0 kudos

Resolved! ODBC setup for KDB+ to query other databases

Hi community, There used to be this link that provides the instructions for the setup, but it's no longer valid and I cannot find out the updated link anywhere. Note that it's for the reverse direction of querying KDB+ via ODBC where the setup is eas...

darrenwsun by New Contributor III
  • 1 replies
  • 0 kudos

Heap is a lot larger than used, how to find the cause?

I've got a process doing some calculations on a timer and sending updated table to another process. Its heap is more than 3x of used even after manual trigger of .Q.gc. key value used 567774096 heap 1946157056 peak 2617245696 I'm using KDB+ 4.0 2021....