17 Nov
2023
17 Nov
'23
6:57 a.m.
Thanks Daniel,
Works like a charm!
Regards,
From: Daniel-Constantin Mierla <miconda(a)gmail.com>
Sent: Friday, November 17, 2023 10:17 AM
To: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>
Cc: Ali Taher <ataher(a)vanrise.com>
Subject: Re: [SR-Users] Re: pv cache limit is going to be exceeded
Hello,
the way the pseudo-variables were designed makes different definitions for
$redis(r=>value[i] and $redis(r=>value[j], practically, if you have the index going
on a large range, then you define a lot of variables. The solution is to leverage another
pseduo-variable that you set with the index, like:
KSR.pvx.var_seti("i", right);
resultRight = tostring(KSR.pv.get("$redis(r=>value[$var(i)])"));
KSR.pvx.var_seti("i", left);
resultLeft = tostring(KSR.pv.get("$redis(r=>value[$var(i)])"));
Cheers,
Daniel
On 16.11.23 10:46, Ali Taher via sr-users wrote:
Hello all,
If the data returned from redis is of type array, and if I want to iterate through all the
elements in the array, then I have to get $redis(r=>value[x]) for each element, and a
pseudo variable for each element is allocated in the memory, is that correct?
Regards,
From: Ali Taher via sr-users
<sr-users@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Sent: Wednesday, November 15, 2023 4:51 PM
To: Kamailio (SER) - Users Mailing List
<sr-users@lists.kamailio.org><mailto:sr-users@lists.kamailio.org>
Cc: Ali Taher <ataher@vanrise.com><mailto:ataher@vanrise.com>
Subject: [SR-Users] pv cache limit is going to be exceeded
Hello all,
I’m using the following Lua script to fetch data from Redis, which is in form of list:
function split(str, delimiter)
for token in string.gmatch(str, "[^" .. delimiter .. "]+") do
return token
end
end
function contains(mainString, subString)
return string.find(mainString, subString, 1, true) ~= nil
end
function longest_match_acode()
local currentSeconds = os.time()
local milliseconds = os.clock() * 1000
local ddate = os.date("%Y-%m-%d %H:%M:%S", currentSeconds) ..
string.format(".%03d", milliseconds)
KSR.xlog.xinfo("starting date:" ..ddate)
local size = 0
local result
local acode = "29192"
local inputbcode = "4474173"
local delimiter = ":"
while size == 0 do
local currentSeconds = os.time()
acode = string.sub(acode, 1, string.len(acode) - 1)
KSR.ndb_redis.redis_cmd("srvN", "LRANGE
price:" .. acode .." 0 -1", "r")
size =
tonumber(KSR.pv.get("$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,
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