Exceed Limit Execution

Exceed Limit Execution

Hi Everyone,

I begin to encounter some execution limit hit, 

The 1st part wherein when a record was being submitted, it checks and patch existing rows (Site Asset Services) matching the submitted row (PMS form)

error:  row1.Serial_N=Final_Rec.AV_Serial_N; - exec limit
error2: row1.Remarks=Final_Rec.AV_Remarks; - exce limit
error3: row1.Credentials=Final_Rec.AV_Credentials; - exec limit

Question:
1. AV_Serial_N - sometimes holds same value - ex: TBA or Unable to Obtain will this cause execution limit?

2. AV_Credentials -  sometimes null/blank


AssetRecord = Site_Asset_Services[SOR_No == input.SOR2 && Type_of_System == "AV System"];
if(AssetRecord.count() > 0)
{
// ---- UPDATE PATH ----
for each  rec in AssetRecord
{
subformRows = rec.Site_Asset;
matchedKeys = list();
for each  row1 in subformRows
{
for each  Final_Rec in input.AV_System
{
if(Final_Rec.AV_Status != row1.Status || Final_Rec.AV_Remarks != row1.Remarks || Final_Rec.AV_IP_Address != row1.IP_Address || Final_Rec.AV_Serial_N != row1.Serial_N)
{
row1.IP_Address=Final_Rec.AV_IP_Address;
row1.Credentials=Final_Rec.AV_Credentials;
row1.Serial_N=Final_Rec.AV_Serial_N;
row1.Status=Final_Rec.AV_Status;
row1.Remarks=Final_Rec.AV_Remarks;
keys = Final_Rec.AV_Floor + "|" + Final_Rec.AV_Room_Name + "|" + Final_Rec.AV_Brand + "|" + Final_Rec.AV_Model + "|" + Final_Rec.AV_Serial_N + "|" + Final_Rec.AV_Description + "|" + Final_Rec.AV_IP_Address + "|" + Final_Rec.AV_Credentials + "|" + Final_Rec.AV_Status + "|" + Final_Rec.AV_Remarks;
matchedKeys.add(keys);
}
}
}
...}

Happy to hear your thoughts.