Thankyou Thierry for your reply. I will change to txn.f[‘req.fhdr’]. On Wed, Aug 1, 2018 at 2:31 PM, Thierry Fournier < [email protected]> wrote:
> 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 > >
