Azure Function执行速度极慢且不一致 [英] Azure Function execution speed is extremely slow and inconsistent

查看：112 发布时间：2020/9/16 1:47:43 javascript azure azure-sql-database azure-functions

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问题描述

我正在编写一些Azure函数脚本，该脚本可读取内部数据库或从内部数据库读取数据并将其显示在网页中.

I am writing few Azure Functions script that reads and write from/to an internal database and display relevant information into a webpage.

在加载调用Azure Function脚本的网页时，我注意到Web UI中的速度极慢，甚至超时.经过进一步调查，我意识到以下几点:

I noticed extreme slowness or even timeout in the web UI when loading the web page which calls the Azure Function script. After further investigation, I realized that the following:

Azure函数脚本有时需要10秒钟到1分钟以上的时间才能连接到SQL数据库.
有时脚本会在几毫秒内运行，有时要花费3分钟以上才能完全运行脚本.

这是我的Azure函数脚本:

Here is my Azure Function script:

module.exports = function(context, req) {

context.log("Function Started: " + new Date());

// Import package
const sql = require('mssql');
var _ = require('underscore-node');
var moment = require('moment');
var Promise = require('promise');
// Create a configuration object for our Azure SQL connection parameters
var config = {
    server: "***", // Use your SQL server name
    database: "***", // Database to connect to
    user: "***", // Use your username
    password: "***", // Use your password
    port: ***,
    // Since we're on Windows Azure, we need to set the following options
    options: {
        encrypt: true
    },
    multipleStatements: true,
    parseJSON: true
};
var flagDefinitionId = null;

if (req.query.Id == null || req.query.Id == "" || req.query.Id.length == 0) {
    context.res = {
        // status: 200, /* Defaults to 200 */
        body: "No have flagDefinitionId "
    };
    context.done();
    // return;
}

var listTicketsFlag = [];

flagDefinitionId = req.query.Id;
sql.close();
var DBSchema = "b8akjsms2_st.";
sql.connect(config).then(function() {
    context.log("SQL Connected: " + new Date());

    var getAllEventTicketGoToMarket = new Promise(function(resolve, reject) {
        var queryGetEvent = ";WITH EventLog1 AS(" +
            " SELECT MD1, max([DateTime]) as LTime from " + DBSchema + "EventLog" +
            " where ([Event] = 'Ticket_Go_To_Market' OR [Event] = 'Acknowledge_Timeout')" +
            " group by MD1 )" +
            " SELECT * from ( SELECT EV.MD1 , EV.MD2," +
            " (SELECT COUNT(*) from " + DBSchema + "EventLog where MD1 = EV.MD1 and [Event] = 'Market_Ticket_Clear') as TotalClear" +
            " FROM " + DBSchema + "[Ticket] T" +
            " JOIN (SELECT E.* from " + DBSchema + "EventLog E join EventLog1 E1 on E.MD1 = E1.MD1 and E.[DateTime] = E1.LTime) EV ON T.Id = EV.MD1" +
            " WHERE T.IsInMarket = 1 and EV.MD2 <> ''" +
            " AND T.Id NOT IN (Select TicketId from " + DBSchema + "TicketFlag where FlagDefinitionId = " + flagDefinitionId + ")" +
            " ) R where R.TotalClear > 0";
        context.log("get event log - Ticket_Go_To_Market" + queryGetEvent);
        new sql.Request().query(queryGetEvent, (err, result) => {
            context.log("this is --------> EventLog " + result.recordset.length);
            resolve(result.recordset);
        });
    });

    Promise.all([getAllEventTicketGoToMarket]).then(function(values) {
        var ticketGoToMarket = values[0];
        context.log("this is --------> values: " + values[0].length + " ==+++++==== " + JSON.stringify(values[0], null, 2));

        if (ticketGoToMarket.length != 0) {
            listTicketsFlag = _.filter(ticketGoToMarket, function(num) {
                var countSP = num.MD2.split(',');
                // context.log("countSP =====> " + countSP.length + "num.TotalClear ==>" + num.TotalClear)
                if (num.TotalClear > countSP.length) {
                    return num.MD1;
                }
            });
            // context.log("listTicketsFlag =====> " + JSON.stringify(listTicketsFlag, null, 2));
        }
        insertTicketFlag();

    });

    function insertTicketFlag() {
        context.log("this is ----- ===> Insert:  " + listTicketsFlag);
        // insert
        var insertTicketFlagPromise = new Promise(function(resolve, reject) {

            context.log("listTicketFlag ----- ===> " + listTicketsFlag.length);

            if (listTicketsFlag.length == 0) {
                context.log(" -------------------- No have ticket need FLAG");
                resolve();

            } else {

                // insert new data to TicketFlag FlagTickets
                var listTicketInsert = ""; //convertArrayToSQLString(listTicketsFlag, true, flagDefinitionId);
                var len = listTicketsFlag.length - 1;
                for (var j = 0; j <= len; j++) {
                    listTicketInsert += '(\'' + listTicketsFlag[j] + '\', \'' + flagDefinitionId + '\')';
                    if (j != len) {
                        listTicketInsert += ",";
                    }
                }
                context.log("HERE : " + listTicketInsert);

                var insertQuery = 'Insert into  ' + DBSchema + '[TicketFlag] (TicketId, FlagDefinitionId) values ' + listTicketInsert + '';

                context.log("this is --------> InsertQuery" + insertQuery);

                // return;

                context.log("read data of FlagRule");
                new sql.Request().query(insertQuery, (err, result) => {
                    context.log("this is --------> insertQuery");
                    resolve(result);

                });
            }
        });

        Promise.all([insertTicketFlagPromise]).then(function(values) {
            context.log("DONE ALL");
            sql.close();
            context.done();
        })
    }

}).catch(function(err) {
    console.log(err);
    context.done();
});

};

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Azure Function执行速度极慢且不一致 [英] Azure Function execution speed is extremely slow and inconsistent

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Azure Function执行速度极慢且不一致 [英] Azure Function execution speed is extremely slow and inconsistent

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