15 Nov
2023
15 Nov
'23
9:51 a.m.
Hello all,
I'm using the following Lua script to fetch data from Redis, which is in form of
list:
function split(str, delimiter)
for token in string.gmatch(str, "[^" .. delimiter .. "]+") do
return token
end
end
function contains(mainString, subString)
return string.find(mainString, subString, 1, true) ~= nil
end
function longest_match_acode()
local currentSeconds = os.time()
local milliseconds = os.clock() * 1000
local ddate = os.date("%Y-%m-%d %H:%M:%S", currentSeconds) ..
string.format(".%03d", milliseconds)
KSR.xlog.xinfo("starting date:" ..ddate)
local size = 0
local result
local acode = "29192"
local inputbcode = "4474173"
local delimiter = ":"
while size == 0 do
local currentSeconds = os.time()
acode = string.sub(acode, 1, string.len(acode) - 1)
KSR.ndb_redis.redis_cmd("srvN", "LRANGE
price:" .. acode .." 0 -1", "r")
size =
tonumber(KSR.pv.get("$redis(r=>size)"))
end
local left = 0
local right = size - 1
while left <= right do
local currentSeconds = os.time()
local milliseconds = os.clock() * 1000
local ddate = os.date("%Y-%m-%d %H:%M:%S", currentSeconds) ..
string.format(".%03d", milliseconds)
resultRight =
tostring(KSR.pv.get("$redis(r=>value[" .. right .. "])"))
resultLeft =
tostring(KSR.pv.get("$redis(r=>value[" .. left .. "])"))
local bcodeLeft = split(resultLeft, delimiter)
local bcodeRight = split(resultRight, delimiter)
if contains(inputbcode, bcodeRight) then
KSR.xlog.xinfo("Input bcode contains
bcode value from Redis: " .. resultRight .. " at index: " .. right ..
" with date: " .. ddate)
end
if contains(inputbcode, bcodeLeft) then
KSR.xlog.xinfo("Input bcode contains bcode value
from Redis: " .. resultLeft .. " at index: " .. left .. " with date:
" .. ddate)
end
left = left + 1
right = right - 1
end
local currentSeconds = os.time()
local milliseconds = os.clock() * 1000
local ddate = os.date("%Y-%m-%d %H:%M:%S", currentSeconds) ..
string.format(".%03d", milliseconds)
KSR.xlog.xinfo("ending date:" ..ddate)
end
function ksr_request_route()
if KSR.is_INVITE() then
longest_match_acode()
KSR.sl.send_reply("404", "Not found");
end
end
I'm getting the following warning in the log : WARNING: LUA {INVITE}: <core>
[core/pvapi.c:340]: pv_cache_add(): pv cache limit is going to be exceeded - pkg memory
may get filled with pv declarations
I think the issue is in the following lines:
resultRight = tostring(KSR.pv.get("$redis(r=>value[" .. right ..
"])"))
resultLeft = tostring(KSR.pv.get("$redis(r=>value[" .. left ..
"])"))
the list coming from Redis has around 30k items, which I'm iterating through using
value[x] which is exhausting the pv declaration as per my understanding.
How to overcome this issue? Is it possible to save the list as an array variable and then
iterate through that array?
Regards,