Hi, The Lua overhead is very low. On my laptop I reach easyly 18 000 HTTP requests by seconds with basic Lua processing. I guess that your code will not have significant impact on perfs.
Note that the function: > txn.http:req_get_headers()["host"][0] Is consume more CPU than txn.f[‘req.fhdr’](‘host’) or txn.sf[‘req.fhdr’](‘host’) Other point: I’m not sure that the split() function exists. Thierry > On 27 Jul 2018, at 14:38, Sachin Shetty <[email protected]> wrote: > > Hi, > > We are doing about 10K requests/minute on a single haproxy server, we have > enough CPUs and memory. Right now each requests looks up a map for backend > info. It works well. > > Now we need to build some expire logic around the map. Like ignore some > entries in the map entries after some time. I could do this in lua, but it > woud mean that every request would make a lua call to look up a map value and > make a decision. > > My lua method looks like this: > > function get_proxy_from_map(txn) > local host = txn.http:req_get_headers()["host"][0] > local value = proxy_map_v2:lookup(host) > if value then > local values = split(value, ",") > local proxy = values[1] > local time = values[2] > if os.time() > tonumber(time) then > core.Alert("Expired: returning nil: " .. host) > return > else > return proxy > end > end > return > end > > > Any suggestions on how this would impact performance, our tests looks ok. > > Thanks > Sachin
