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sachin_80710's avatar
sachin_80710
Icon for Nimbostratus rankNimbostratus
Nov 21, 2018

Limitation of entries of key/value in session table using table command

Hi,

 

Anyone is aware of limitation of entries of key/value pair in the session table using table command. Like maximum 10000 key/value pair or 1000000 key/value pair.

 

I have read table command article under https://devcentral.f5.com/wiki/iRules.table.ashx?lc=1 At the end of the article they have mentioned "Note: The total size of key+data for individual entries in the session table is limited to roughly 64KB." If 64KB is session table limitation then maximum how many key/value entries we can store?

 

Thanks,

 

Sachin

 

application delivery
iRules
  • PeteWhite's avatar
    PeteWhite
    Icon for Employee rankEmployee
    Nov 21, 2018

    So the point here is that the more entries you add the more memory you will use up. For instance, if you have 1 million 1Byte entries then you would expect to use 1MB (in reality it would be more of course), but if you are using 64KB it would be 64GB. So you should work it out yourself - the impact is on memory but could affect CPU as well if doing a search. In reality, I wouldn't want to go beyond 100K entries but i guess it's your own decision.