I'm not sure, because the final overhead depends on the object sizes. There is a buffer for CQ, which stores 1000 entries by default, but you can decrease it using property IGNITE_CONTINUOUS_QUERY_SERVER_BUFFER_SIZE
Evgenii вт, 18 февр. 2020 г. в 18:09, narges saleh <snarges...@gmail.com>: > Hi Evgeni, > > There will be several thousands notifications/day if I have it send > notification only when certain patterns are visited, in about 100+ caches, > which brings up another question: wouldn't having 100+ CQs be creating too > much overhead? > > thanks. > > On Tue, Feb 18, 2020 at 2:17 PM Evgenii Zhuravlev < > e.zhuravlev...@gmail.com> wrote: > >> Hi, >> >> How many notifications do you want to get? If it's just a several >> notifications, then you can even register separate CQ for each of the entry >> with its own remote filters. At the same time, if you have a requirement to >> send these notifications for a lot of entries, then this approach will >> create a big overhead. >> >> Its possible to unregister a CQ after you get first notification - you >> just need to return FALSE from a remote filter. Also, you can send not >> exact entry, but only some fields using Transformer: >> https://www.gridgain.com/docs/latest/developers-guide/key-value-api/continuous-queries#remote-transformer. >> You can create some another object, which will contain only part of the >> fields. >> >> Best Regards, >> Evgeni >> >> >> пн, 17 февр. 2020 г. в 03:58, narges saleh <snarges...@gmail.com>: >> >>> Hi All, >>> I am getting the following streams of the following records: >>> name, org, year, month, day >>> 1- john, acc, 2004, 2, 1 >>> 2- pete, rd, 2004, 3,1 >>> 3- jim,hr,2004, 5,2 >>> 4- jerry,math,2005,2,1 >>> 5- betty,park,2005,3,2 >>> 6- carry,acc,2006,1,1 >>> >>> I want to get notification for the first occurrence of a particular >>> value. So, I want to get notifications when I get records 1, 4 and 6, and >>> in this case, I want to get the fields, org, and year back only. >>> >>> Questions: >>> 1) Is CQ overkill in this case? If yes, what's a better alternative? >>> 2) If not, how can I set up CQ to get only one record per occurrence? >>> 3) How would I return only org and year back with the CQ transformer, >>> considering that I am working with a flat object? Note that in reality this >>> record has 25-30 fields (I am showing only 5 of them). >>> >>> thanks. >>> >>
