Performance Issue

[SriramKP]

When I click Modules in Admin Panel Back Office, it is taking arround 2mins to view the modules page. I want to know how to find where is the problem.

 

 

I have seen the below link for performance issue, but even after emptying the guest table it is taking same time(2mins).

 

https://www.prestashop.com/forums/topic/266421-500000-rows-on-ps-guest-sounds-too-big/

 

 

Kindly suggest to find the root cause of the problem.

[selectshop.at]

Please activate debug modus. https://www.prestashop.com/forums/topic/224525-how-to-turn-on-error-reporting-for-debug-information-blank-page-500-internal-server-error/

Did you already deinstalled cron module ? This is causing bad performances on back-office.

[SriramKP]

After enabling the profiling, we are surprised the with sql query issue. The queries are really taking longer time for getting the data.

we have uploaded less than 5,000 products. we generally upload the product sheet when there is price change or stock update.

 

For more details please find the attached screenshots.

 

The below query is taking 82 seconds and it is showing that the rows executed is 31433232.

 

SELECT SQL_NO_CACHE p.*,

product_shop.*,
product_shop.id_category_default,
pl.*,
MAX(image_shop.`id_image`) id_image,
il.legend,
m.name manufacturer_name,
MAX(product_attribute_shop.id_product_attribute) id_product_attribute,
DATEDIFF(product_shop.`date_add`, DATE_SUB(NOW(), INTERVAL 70 DAY)) > 0 AS new,
stock.out_of_stock, IFNULL(stock.quantity, 0) as quantity
FROM `eh_category_product` cp
LEFT JOIN eh_category c ON (c.id_category = cp.id_category)
LEFT JOIN `eh_product` p ON p.`id_product` = cp.`id_product`
INNER JOIN eh_product_shop product_shop
ON (product_shop.id_product = p.id_product AND product_shop.id_shop = 1)
LEFT JOIN `eh_product_attribute` pa ON (p.`id_product` = pa.`id_product`)
LEFT JOIN eh_product_attribute_shop product_attribute_shop
ON (product_attribute_shop.id_product_attribute = pa.id_product_attribute AND product_attribute_shop.id_shop = 1 AND product_attribute_shop.`default_on` = 1)
LEFT
JOIN eh_stock_available stock
ON (stock.id_product = p.id_product AND stock.id_product_attribute = IFNULL(`product_attribute_shop`.id_product_attribute, 0) AND stock.id_shop = 1 AND stock.id_shop_group = 0 )
LEFT JOIN eh_product_lang pl ON (pl.id_product = p.id_product AND pl.id_shop = 1 AND pl.id_lang = 1)
LEFT JOIN `eh_image` i ON (i.`id_product` = p.`id_product`) LEFT JOIN eh_image_shop image_shop
ON (image_shop.id_image = i.id_image AND image_shop.id_shop = 1 AND image_shop.cover=1)
LEFT JOIN `eh_image_lang` il ON (image_shop.`id_image` = il.`id_image` AND il.`id_lang` = 1)
LEFT JOIN eh_manufacturer m ON (m.id_manufacturer = p.id_manufacturer)
WHERE product_shop.`active` = 1 AND product_shop.`visibility` IN ("both", "catalog")
AND c.nleft >= 3 AND c.nright <= 78
AND c.active = 1
AND p.id_product IN (268,269,270,271,272,273,274,275,276,277,278,286,287,288,289,290,291,293,299,300,301,302,303,304,305,306,307,308,309,310,311,312,313,314,315,316,317,318,319,320,321,322,323,324,325,326,327,328,329,330,331,332,333,334,335,336,337,338,339,340,341,342,343,344,345,346,347,348,349,350,351,352,353,354,355,356,357,358,359,360,361,362,363,364,365,366,367,368,369,370,371,372,373,374,375,376,377,378,379,380,381,382,383,384,385,386,387,388,389,390,391,392,393,394,395,396,397,398,399,400,401,402,403,404,405,406,407,408,409,410,411,412,413,414,415,416,417,418,419,420,421,422,423,424,425,426,427,428,429,430,431,432,433,434,435,436,437,438,439,440,441,442,443,444,445,446,447,448,449,450,451,452,453,454,455,456,457,458,459,460,461,462,463,464,465,466,467,468,469,470,471,472,473,474,475,476,477,478,479,480,481,482,483,484,485,486,487,488,489,490,491,492,493,494,495,496,497,498,499,500,501,502,503,504,505,506,507,508,509,510,511,512,513,514,515,516,517,518,519,520,521,522,523,524,525,526,527,528,529,530,531,532,533,534,535,536,537,538,539,540,541,542,543,544,545,546,547,548,549,550,551,552,553,554,555,556,557,558,559,560,561,562,563,564,565,566,567,568,569,570,571,572,573,574,575,576,577,578,579,580,581,582,583,584,585,586,587,588,589,590,591,592,593,594,595,596,597,598,599,600,601,602,603,604,605,606,607,608,609,610,611,612,613,614,615,616,617,618,619,620,621,622,623,624,625,626,627,628,629,630,631,632,633,634,635,636,637,638,639,640,641,642,643,644,645,646,647,648,649,650,651,652,653,654,655,656,657,658,659,660,661,662,663,664,665,666,667,668,669,670,671,672,673,674,675,676,677,678,679,680,681,682,683,684,685,686,687,688,689,690,691,692,693,699,702,703,704,705,706,707,708,709,710,711,712,713,714,715,716,717,718,719,720,721,722,723,724,725,726,727,728,729,730,731,732,733,734,735,736,737,738,739,740,741,742,743,744,745,746,747,748,749,750,751,752,753,754,755,756,757,758,759,760,761,762,763,764,765,766,767,768,769,770,771,772,773,774,775,776,777,778,779,780,781,782,783,784,785,786,787,788,789,790,791,792,793,794,795,796,797,798,799,800,801,802,803,804,805,806,807,808,809,810,811,812,813,814,815,816,817,818,819,820,821,822,823,824,825,826,827,828,829,830,831,839,840,841,842,843,844,845,846,847,848,849,850,851,852,853,854,855,856,857,858,859,860,861,862,863,864,865,866,867,868,869,870,871,872,873,874,875,876,877,878,879,880,881,882,883,884,885,886,887,888,889,890,891,892,893,894,895,896,897,898,899,900,901,902,903,904,905,906,907,908,909,910,911,912,913,914,915,916,917,925,926,927,928,929,930,931,932,933,934,935,936,937,938,939,940,941,942,943,944,945,946,947,948,949,950,951,952,953,954,955,956,957,958,959,960,961,962,963,964,965,966,967,968,969,970,971,972,973,974,975,976,977,978,979,988,989,990,991,992,993,994,995,996,997,998,999,1000,1001,1002,1003,1004,1005,1006,1007,1008,1009,1010,1011,1012,1013,1014,1015,1016,1017,1018,1019,1020,1021,1022,1023,1024,1025,1026,1027,1028,1029,1030,1031,1032,1033,1034,1035,1036,1037,1038,1039,1040,1041,1042,1043,1044,1045,1046,1047,1048,1049,1050,1051,1052,1053,1054,1055,1056,1057,1058,1059,1060,1061,1062,1063,1064,1065,1066,1067,1068,1069,1070,1071,1072,1073,1074,1075,1076,1077,1078,1079,1080,1081,1082,1083,1084,1085,1086,1087,1088,1089,1090,1091,1092,1093,1094,1095,1096,1097,1098,1099,1100,1101,1102,1103,1104,1105,1106,1107,1108,1109,1110,1111,1112,1113,1114,1115,1116,1117,1118,1119,1120,1121,1122,1123,1124,1125,1126,1127,1128,1129,1130,1131,1132,1133,1134,1135,1136,1137,1138,1139,1140,1141,1142,1150,1151,1152,1153,1154,1155,1156,1157,1158,1159,1160,1161,1162,1163,1164,1165,1166,1167,1168,1169,1170,1171,1172,1173,1174,1175,1176,1177,1178,1179,1180,1181,1182,1183,1184,1185,1186,1187,1188,1189,1190,1191,1192,1193,1194,1195,1196,1197,1198,1199,1200,1201,1202,1203,1204,1205,1206,1207,1208,1209,1210,1211,1212,1213,1214,1215,1216,1217,1218,1219,1220,1221,1222,1223,1224,1225,1226,1227,1228,1229,1230,1231,1232,1233,1234,1235,1236,1237,1238,1239,1240,1241,1242,1243,1244,1245,1246,1247,1248,1249,1250,1251,1252,1253,1254,1255,1256,1257,1258,1259,1260,1261,1262,1263,1264,1265,1266,1267,1268,1269,1270,1271,1272,1273,1274,1275,1276,1277,1278,1279,1280,1281,1282,1283,1284,1285,1286,1287,1288,1289,1290,1291,1292,1293,1294,1295,1296,1297,1298,1299,1300,1301,1302,1303,1304,1305,1306,1307,1308,1309,1310,1311,1312,1313,1314,1315,1316,1317,1318,1319,1320,1321,1322,1323,1324,1325,1326,1327,1328,1329,1330,1331,1332,1333,1334,1335,1336,1337,1338,1339,1340,1341,1342,1343,1344,1362,1363,1364,1365,1366,1367,1368,1369,1370,1371,1372,1373,1374,1375,1376,1377,1378,1379,1380,1381,1382,1383,1384,1385,1386,1387,1388,1389,1390,1391,1392,1393,1394,1395,1396,1397,1398,1399,1400,1401,1402,1403,1404,1405,1406,1407,1408,1409,1410,1411,1412,1413,1414,1415,1416,1417,1418,1419,1420,1421,1422,1423,1424,1425,1426,1427,1428,1429,1430,1431,1432,1433,1434,1435,1436,1437,1438,1439,1440,1441,1442,1443,1444,1445,1446,1447,1448,1449,1450,1451,1452,1453,1454,1455,1456,1457,1458,1459,1460,1461,1462,1463,1464,1465,1466,1467,1468,1469,1470,1471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GROUP BY product_shop.id_product
ORDER BY cp.position desc LIMIT 0,24

 

The below query is taking 82 seconds and it is showing that the rows executed is 3,21,76,797. We are really not sure why these many records are created.

 

SELECT SQL_NO_CACHE SQL_CALC_FOUND_ROWS

a.`id_product`,b.name as name,`reference`,a.price as price,sa.active as active

, shop.name as shopname, a.id_shop_default, MAX(image_shop.id_image) id_image, cl.name `name_category`, sa.`price`, 0 AS price_final, a.`is_virtual`, pd.`nb_downloadable`, sav.`quantity` as sav_quantity, sa.`active`, IF(sav.`quantity`<=0, 1, 0) badge_danger

FROM `eh_product` a

LEFT JOIN `eh_product_lang` b ON (b.`id_product` = a.`id_product` AND b.`id_lang` = 1 AND b.`id_shop` = 1)

LEFT JOIN `eh_image` i ON (i.`id_product` = a.`id_product`)

LEFT JOIN `eh_stock_available` sav ON (sav.`id_product` = a.`id_product` AND sav.`id_product_attribute` = 0

AND sav.id_shop = 1  AND sav.id_shop_group = 0 )  JOIN `eh_product_shop` sa ON (a.`id_product` = sa.`id_product` AND sa.id_shop = a.id_shop_default)

LEFT JOIN `eh_category_lang` cl ON (sa.`id_category_default` = cl.`id_category` AND b.`id_lang` = cl.`id_lang` AND cl.id_shop = a.id_shop_default)

LEFT JOIN `eh_shop` shop ON (shop.id_shop = a.id_shop_default) 

LEFT JOIN `eh_image_shop` image_shop ON (image_shop.`id_image` = i.`id_image` AND image_shop.`cover` = 1 AND image_shop.id_shop = a.id_shop_default)

LEFT JOIN `eh_product_download` pd ON (pd.`id_product` = a.`id_product`) 

WHERE 1 

GROUP BY sa.id_product 

ORDER BY a.`id_product` ASC LIMIT 0,50

[Kerm]

May be you need better hosting. Also on modules page use filters to show only active/installed modules it will increase page load speed.

[SriramKP]

I kept active/installed filter for modules. But there is no use. Its not only problem for navigating through modules, more problem is coming when the user navigates through the product categories.

 

Its clearly showing that, it is querying more than 3,20,00,000 rows for Just 4000 products. This must be wrong sign...

 

Its not problem with hosting. Iam using Amazon cloud services. If I put my old database the performance is good. I really stuck up and I am not really sure what is the right way to go forward. It will be great if some one can suggest the way I need to go forward for resolution.

Edited August 12, 2015 by SriramKP (see edit history)

[Kerm]

Try optimize your shop, remove modules in hooks on pages where this modules dont need, also you can buy and use modules like cache manager or page cache for it.