Help
kdb+ and q
Q+A on all things kdb+ database and the q language
cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 

Forum Posts

Start a conversation

how to limit memory in script ?

Currently from command line ,I am setting memory like :q -w 500but when I require it within a script what would be the way..'system' command ? not sureIs there any other way /approach to limit the memory too ?

sweta by • New Contributor
  • 591 Views
  • 1 replies
  • 0 kudos

Can .Q.dpft create segmented tables?

/ Can I use .Q.dpft instead of functional dot apply to write these 2 tables? Thx.quote:([]time:("p"$2016.06.01)+til 3; sym:`A`B`C; price:0.1*til 3);quoteEnum:.Q.en[`:/tmp/hdb/head][quote];.[`:/tmp/hdb/gamma/2016.06.01/gamma/; (); :; quoteEnum];.[`:/t...

LamHinYan by • New Contributor
  • 774 Views
  • 1 replies
  • 0 kudos

segmented database with different date ranges

/ How can I fix this? Thx.quote:([]time:("p"$2016.06.01)+til 3; sym:`A`B`C; price:0.1*til 3);quoteEnum:.Q.en[`:/tmp/hdb/head][quote];.[`:/tmp/hdb/gamma/2016.06.01/gamma/; (); :; quoteEnum];.[`:/tmp/hdb/delta/2016.06.02/delta/; (); :; quoteEnum];`:/tm...

LamHinYan by • New Contributor
  • 1871 Views
  • 5 replies
  • 0 kudos

reverse aj aka find the next element after a time

I frequently face the need to find the next element (bid/ask/trade) after an event/signal. I was wondering if there is a reverse aj trick which i am missing.currently I use a hackish approach where I subtract time from a large/eod time and then do an...

Labels
Main Office Contacts

EMEA
Tel: +44 (0)28 3025 2242

AMERICAS
Tel: +1 (212) 447 6700

APAC
Tel: +61 (0)2 9236 5700

Useful Information
Resources
Popular Links
Follow Us

KX. All Rights Reserved.

KX and kdb+ are registered trademarks of KX Systems, Inc., a subsidiary of FD Technologies plc.

Privacy Policy

Export Statement

Terms of Use

Processing Notice