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Sampling lets you keep costs under control without losing visibility into what matters. evlog uses a two-tier approach: head sampling drops noise upfront, tail sampling rescues critical events after the fact.",[577,578,581,584,610],"prompt",{":actions":579,"description":580,"icon":64},"[\"copy\",\"cursor\",\"claude\"]","Enable head and tail sampling",[573,582,583],{},"Enable head and tail sampling in my evlog production config.",[585,586,587,591,594,601,604,607],"ul",{},[588,589,590],"li",{},"Identify my framework and locate the evlog config (nuxt.config.ts, lib\u002Fevlog.ts, initLogger, etc.)",[588,592,593],{},"Configure sampling.rates per level: { info: 10, warn: 50, debug: 0, error: 100 } as a starting point",[588,595,596,597],{},"Add sampling.keep rules to force-keep critical events: ",[598,599,600],"span",{},"{ status: 400 }, { duration: 1000 }, { path: '\u002Fapi\u002Fcritical\u002F**' }",[588,602,603],{},"For business-specific keep logic (e.g. premium users), add a custom keep callback or evlog:emit:keep hook",[588,605,606],{},"Wrap sampling in a $production override so dev keeps full logging",[588,608,609],{},"Confirm errors are always kept by default unless I explicitly set error: 0",[573,611,612,613,619,620],{},"Docs: ",[614,615,616],"a",{"href":616,"rel":617},"https:\u002F\u002Fwww.evlog.dev\u002Flearn\u002Fsampling",[618],"nofollow","\nBest practices: ",[614,621,622],{"href":622,"rel":623},"https:\u002F\u002Fwww.evlog.dev\u002Freference\u002Fbest-practices",[618],[625,626,628],"h2",{"id":627},"drop-noise-before-it-is-built","Drop noise before it is built",[573,630,631,632,636],{},"Head sampling randomly keeps a percentage of logs per level. It runs ",[633,634,635],"strong",{},"before"," the request completes, acting as a coin flip at emission time.",[638,639],"head-sampling-plinko",{},[641,642,643,830,989],"code-group",{},[644,645,651],"pre",{"className":646,"code":647,"filename":648,"language":649,"meta":650,"style":650},"language-typescript shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","export default defineNuxtConfig({\n  modules: ['evlog\u002Fnuxt'],\n  evlog: {\n    sampling: {\n      rates: {\n        info: 10,    \u002F\u002F Keep 10% of info logs\n        warn: 50,    \u002F\u002F Keep 50% of warnings\n        debug: 0,    \u002F\u002F Drop all debug logs\n        error: 100,  \u002F\u002F Always keep errors (default)\n      },\n    },\n  },\n})\n","nuxt.config.ts","typescript","",[652,653,654,677,705,716,726,736,755,771,787,803,809,815,821],"code",{"__ignoreMap":650},[598,655,658,662,665,669,673],{"class":656,"line":657},"line",1,[598,659,661],{"class":660},"s7zQu","export",[598,663,664],{"class":660}," default",[598,666,668],{"class":667},"s2Zo4"," defineNuxtConfig",[598,670,672],{"class":671},"sTEyZ","(",[598,674,676],{"class":675},"sMK4o","{\n",[598,678,680,684,687,690,693,697,699,702],{"class":656,"line":679},2,[598,681,683],{"class":682},"swJcz","  modules",[598,685,686],{"class":675},":",[598,688,689],{"class":671}," [",[598,691,692],{"class":675},"'",[598,694,696],{"class":695},"sfazB","evlog\u002Fnuxt",[598,698,692],{"class":675},[598,700,701],{"class":671},"]",[598,703,704],{"class":675},",\n",[598,706,708,711,713],{"class":656,"line":707},3,[598,709,710],{"class":682},"  evlog",[598,712,686],{"class":675},[598,714,715],{"class":675}," {\n",[598,717,719,722,724],{"class":656,"line":718},4,[598,720,721],{"class":682},"    sampling",[598,723,686],{"class":675},[598,725,715],{"class":675},[598,727,729,732,734],{"class":656,"line":728},5,[598,730,731],{"class":682},"      rates",[598,733,686],{"class":675},[598,735,715],{"class":675},[598,737,739,742,744,748,751],{"class":656,"line":738},6,[598,740,741],{"class":682},"        info",[598,743,686],{"class":675},[598,745,747],{"class":746},"sbssI"," 10",[598,749,750],{"class":675},",",[598,752,754],{"class":753},"sHwdD","    \u002F\u002F Keep 10% of info logs\n",[598,756,758,761,763,766,768],{"class":656,"line":757},7,[598,759,760],{"class":682},"        warn",[598,762,686],{"class":675},[598,764,765],{"class":746}," 50",[598,767,750],{"class":675},[598,769,770],{"class":753},"    \u002F\u002F Keep 50% of warnings\n",[598,772,774,777,779,782,784],{"class":656,"line":773},8,[598,775,776],{"class":682},"        debug",[598,778,686],{"class":675},[598,780,781],{"class":746}," 0",[598,783,750],{"class":675},[598,785,786],{"class":753},"    \u002F\u002F Drop all debug logs\n",[598,788,790,793,795,798,800],{"class":656,"line":789},9,[598,791,792],{"class":682},"        error",[598,794,686],{"class":675},[598,796,797],{"class":746}," 100",[598,799,750],{"class":675},[598,801,802],{"class":753},"  \u002F\u002F Always keep errors (default)\n",[598,804,806],{"class":656,"line":805},10,[598,807,808],{"class":675},"      },\n",[598,810,812],{"class":656,"line":811},11,[598,813,814],{"class":675},"    },\n",[598,816,818],{"class":656,"line":817},12,[598,819,820],{"class":675},"  },\n",[598,822,824,827],{"class":656,"line":823},13,[598,825,826],{"class":675},"}",[598,828,829],{"class":671},")\n",[644,831,834],{"className":646,"code":832,"filename":833,"language":649,"meta":650,"style":650},"import { createEvlog } from 'evlog\u002Fnext'\n\nexport const { withEvlog, useLogger } = createEvlog({\n  service: 'my-app',\n  sampling: {\n    rates: {\n      info: 10,\n      warn: 50,\n      debug: 0,\n      error: 100,\n    },\n  },\n})\n","lib\u002Fevlog.ts (Next.js)",[652,835,836,862,868,897,913,922,931,942,953,964,975,979,983],{"__ignoreMap":650},[598,837,838,841,844,847,850,853,856,859],{"class":656,"line":657},[598,839,840],{"class":660},"import",[598,842,843],{"class":675}," {",[598,845,846],{"class":671}," createEvlog",[598,848,849],{"class":675}," }",[598,851,852],{"class":660}," from",[598,854,855],{"class":675}," '",[598,857,858],{"class":695},"evlog\u002Fnext",[598,860,861],{"class":675},"'\n",[598,863,864],{"class":656,"line":679},[598,865,867],{"emptyLinePlaceholder":866},true,"\n",[598,869,870,872,876,878,881,883,886,888,891,893,895],{"class":656,"line":707},[598,871,661],{"class":660},[598,873,875],{"class":874},"spNyl"," const",[598,877,843],{"class":675},[598,879,880],{"class":671}," withEvlog",[598,882,750],{"class":675},[598,884,885],{"class":671}," useLogger ",[598,887,826],{"class":675},[598,889,890],{"class":675}," =",[598,892,846],{"class":667},[598,894,672],{"class":671},[598,896,676],{"class":675},[598,898,899,902,904,906,909,911],{"class":656,"line":718},[598,900,901],{"class":682},"  service",[598,903,686],{"class":675},[598,905,855],{"class":675},[598,907,908],{"class":695},"my-app",[598,910,692],{"class":675},[598,912,704],{"class":675},[598,914,915,918,920],{"class":656,"line":728},[598,916,917],{"class":682},"  sampling",[598,919,686],{"class":675},[598,921,715],{"class":675},[598,923,924,927,929],{"class":656,"line":738},[598,925,926],{"class":682},"    rates",[598,928,686],{"class":675},[598,930,715],{"class":675},[598,932,933,936,938,940],{"class":656,"line":757},[598,934,935],{"class":682},"      info",[598,937,686],{"class":675},[598,939,747],{"class":746},[598,941,704],{"class":675},[598,943,944,947,949,951],{"class":656,"line":773},[598,945,946],{"class":682},"      warn",[598,948,686],{"class":675},[598,950,765],{"class":746},[598,952,704],{"class":675},[598,954,955,958,960,962],{"class":656,"line":789},[598,956,957],{"class":682},"      debug",[598,959,686],{"class":675},[598,961,781],{"class":746},[598,963,704],{"class":675},[598,965,966,969,971,973],{"class":656,"line":805},[598,967,968],{"class":682},"      error",[598,970,686],{"class":675},[598,972,797],{"class":746},[598,974,704],{"class":675},[598,976,977],{"class":656,"line":811},[598,978,814],{"class":675},[598,980,981],{"class":656,"line":817},[598,982,820],{"class":675},[598,984,985,987],{"class":656,"line":823},[598,986,826],{"class":675},[598,988,829],{"class":671},[644,990,993],{"className":646,"code":991,"filename":992,"language":649,"meta":650,"style":650},"import { initLogger } from 'evlog'\n\ninitLogger({\n  env: { service: 'my-app' },\n  sampling: {\n    rates: {\n      info: 10,\n      warn: 50,\n      debug: 0,\n      error: 100,\n    },\n  },\n})\n","index.ts (Hono \u002F Express \u002F Fastify)",[652,994,995,1015,1019,1028,1051,1059,1067,1077,1087,1097,1107,1111,1115],{"__ignoreMap":650},[598,996,997,999,1001,1004,1006,1008,1010,1013],{"class":656,"line":657},[598,998,840],{"class":660},[598,1000,843],{"class":675},[598,1002,1003],{"class":671}," initLogger",[598,1005,849],{"class":675},[598,1007,852],{"class":660},[598,1009,855],{"class":675},[598,1011,1012],{"class":695},"evlog",[598,1014,861],{"class":675},[598,1016,1017],{"class":656,"line":679},[598,1018,867],{"emptyLinePlaceholder":866},[598,1020,1021,1024,1026],{"class":656,"line":707},[598,1022,1023],{"class":667},"initLogger",[598,1025,672],{"class":671},[598,1027,676],{"class":675},[598,1029,1030,1033,1035,1037,1040,1042,1044,1046,1048],{"class":656,"line":718},[598,1031,1032],{"class":682},"  env",[598,1034,686],{"class":675},[598,1036,843],{"class":675},[598,1038,1039],{"class":682}," service",[598,1041,686],{"class":675},[598,1043,855],{"class":675},[598,1045,908],{"class":695},[598,1047,692],{"class":675},[598,1049,1050],{"class":675}," },\n",[598,1052,1053,1055,1057],{"class":656,"line":728},[598,1054,917],{"class":682},[598,1056,686],{"class":675},[598,1058,715],{"class":675},[598,1060,1061,1063,1065],{"class":656,"line":738},[598,1062,926],{"class":682},[598,1064,686],{"class":675},[598,1066,715],{"class":675},[598,1068,1069,1071,1073,1075],{"class":656,"line":757},[598,1070,935],{"class":682},[598,1072,686],{"class":675},[598,1074,747],{"class":746},[598,1076,704],{"class":675},[598,1078,1079,1081,1083,1085],{"class":656,"line":773},[598,1080,946],{"class":682},[598,1082,686],{"class":675},[598,1084,765],{"class":746},[598,1086,704],{"class":675},[598,1088,1089,1091,1093,1095],{"class":656,"line":789},[598,1090,957],{"class":682},[598,1092,686],{"class":675},[598,1094,781],{"class":746},[598,1096,704],{"class":675},[598,1098,1099,1101,1103,1105],{"class":656,"line":805},[598,1100,968],{"class":682},[598,1102,686],{"class":675},[598,1104,797],{"class":746},[598,1106,704],{"class":675},[598,1108,1109],{"class":656,"line":811},[598,1110,814],{"class":675},[598,1112,1113],{"class":656,"line":817},[598,1114,820],{"class":675},[598,1116,1117,1119],{"class":656,"line":823},[598,1118,826],{"class":675},[598,1120,829],{"class":671},[573,1122,1123,1124,1127],{},"Each level is a percentage from 0 to 100. Levels you don't configure default to 100% (keep everything). Error defaults to 100% even when other levels are configured, so you have to explicitly set ",[652,1125,1126],{},"error: 0"," to drop errors.",[1129,1130,1132,1133,1136],"callout",{"color":1131,"icon":13},"info","Head sampling is random. A ",[652,1134,1135],{},"10%"," rate means roughly 1 in 10 info logs are kept, not exactly 1 in 10.",[625,1138,1140],{"id":1139},"keep-an-event-once-you-know-its-outcome","Keep an event once you know its outcome",[573,1142,1143,1144,1147],{},"Head sampling is blind: it doesn't know if a request was slow, failed, or hit a critical path. Tail sampling fixes this by evaluating ",[633,1145,1146],{},"after"," the request completes and force-keeping logs that match specific conditions.",[644,1149,1151],{"className":646,"code":1150,"filename":648,"language":649,"meta":650,"style":650},"\u002F\u002F Sampling config, works the same across all frameworks\nevlog: {\n  sampling: {\n    rates: { info: 10 },\n    keep: [\n      { status: 400 },              \u002F\u002F HTTP status >= 400\n      { duration: 1000 },           \u002F\u002F Request took >= 1s\n      { path: '\u002Fapi\u002Fpayments\u002F**' }, \u002F\u002F Critical path (glob)\n    ],\n  },\n}\n",[652,1152,1153,1158,1167,1175,1192,1202,1221,1238,1259,1266,1270],{"__ignoreMap":650},[598,1154,1155],{"class":656,"line":657},[598,1156,1157],{"class":753},"\u002F\u002F Sampling config, works the same across all frameworks\n",[598,1159,1160,1163,1165],{"class":656,"line":679},[598,1161,1012],{"class":1162},"sBMFI",[598,1164,686],{"class":675},[598,1166,715],{"class":675},[598,1168,1169,1171,1173],{"class":656,"line":707},[598,1170,917],{"class":1162},[598,1172,686],{"class":675},[598,1174,715],{"class":675},[598,1176,1177,1179,1181,1183,1186,1188,1190],{"class":656,"line":718},[598,1178,926],{"class":1162},[598,1180,686],{"class":675},[598,1182,843],{"class":675},[598,1184,1185],{"class":1162}," info",[598,1187,686],{"class":675},[598,1189,747],{"class":746},[598,1191,1050],{"class":675},[598,1193,1194,1197,1199],{"class":656,"line":728},[598,1195,1196],{"class":1162},"    keep",[598,1198,686],{"class":675},[598,1200,1201],{"class":682}," [\n",[598,1203,1204,1207,1210,1212,1215,1218],{"class":656,"line":738},[598,1205,1206],{"class":675},"      {",[598,1208,1209],{"class":682}," status",[598,1211,686],{"class":675},[598,1213,1214],{"class":746}," 400",[598,1216,1217],{"class":675}," },",[598,1219,1220],{"class":753},"              \u002F\u002F HTTP status >= 400\n",[598,1222,1223,1225,1228,1230,1233,1235],{"class":656,"line":757},[598,1224,1206],{"class":675},[598,1226,1227],{"class":682}," duration",[598,1229,686],{"class":675},[598,1231,1232],{"class":746}," 1000",[598,1234,1217],{"class":675},[598,1236,1237],{"class":753},"           \u002F\u002F Request took >= 1s\n",[598,1239,1240,1242,1245,1247,1249,1252,1254,1256],{"class":656,"line":773},[598,1241,1206],{"class":675},[598,1243,1244],{"class":682}," path",[598,1246,686],{"class":675},[598,1248,855],{"class":675},[598,1250,1251],{"class":695},"\u002Fapi\u002Fpayments\u002F**",[598,1253,692],{"class":675},[598,1255,1217],{"class":675},[598,1257,1258],{"class":753}," \u002F\u002F Critical path (glob)\n",[598,1260,1261,1264],{"class":656,"line":789},[598,1262,1263],{"class":682},"    ]",[598,1265,704],{"class":675},[598,1267,1268],{"class":656,"line":805},[598,1269,820],{"class":675},[598,1271,1272],{"class":656,"line":811},[598,1273,1274],{"class":675},"}\n",[573,1276,1277,1278,1281,1282,1285,1286,1289,1290,1293,1294,1297],{},"Conditions use ",[633,1279,1280],{},">="," comparison for ",[652,1283,1284],{},"status"," and ",[652,1287,1288],{},"duration",", and glob matching for ",[652,1291,1292],{},"path",". If ",[633,1295,1296],{},"any"," condition matches, the log is kept regardless of head sampling (OR logic).",[1299,1300,1302],"h3",{"id":1301},"conditions-you-can-match-on","Conditions you can match on",[1304,1305,1306,1322],"table",{},[1307,1308,1309],"thead",{},[1310,1311,1312,1316,1319],"tr",{},[1313,1314,1315],"th",{},"Condition",[1313,1317,1318],{},"Type",[1313,1320,1321],{},"Description",[1323,1324,1325,1344,1357],"tbody",{},[1310,1326,1327,1332,1337],{},[1328,1329,1330],"td",{},[652,1331,1284],{},[1328,1333,1334],{},[652,1335,1336],{},"number",[1328,1338,1339,1340,1343],{},"Keep if HTTP status >= value (e.g., ",[652,1341,1342],{},"400"," catches all 4xx and 5xx)",[1310,1345,1346,1350,1354],{},[1328,1347,1348],{},[652,1349,1288],{},[1328,1351,1352],{},[652,1353,1336],{},[1328,1355,1356],{},"Keep if request duration >= value in milliseconds",[1310,1358,1359,1363,1368],{},[1328,1360,1361],{},[652,1362,1292],{},[1328,1364,1365],{},[652,1366,1367],{},"string",[1328,1369,1370,1371,1374],{},"Keep if request path matches glob pattern (e.g., ",[652,1372,1373],{},"'\u002Fapi\u002Fcritical\u002F**'",")",[625,1376,1378],{"id":1377},"combine-head-and-tail-sampling","Combine head and tail sampling",[573,1380,1381],{},"The two tiers complement each other:",[1383,1384,1385,1391,1401,1407],"ol",{},[588,1386,1387,1390],{},[633,1388,1389],{},"Request completes"," - evlog knows the status, duration, and path",[588,1392,1393,1396,1397,1400],{},[633,1394,1395],{},"Tail sampling evaluates"," - if any ",[652,1398,1399],{},"keep"," condition matches, the log is force-kept",[588,1402,1403,1406],{},[633,1404,1405],{},"Head sampling applies"," - only if tail sampling didn't force-keep, the random percentage check runs",[588,1408,1409,1412],{},[633,1410,1411],{},"Log emits or drops"," - kept logs go through enrichment and draining as normal",[573,1414,1415,1416,1419,1420,1422],{},"This means a request to ",[652,1417,1418],{},"\u002Fapi\u002Fpayments\u002Fcharge"," that returns a 500 in 2 seconds will always be logged, even if ",[652,1421,1131],{}," is set to 1%. The tail conditions rescue it.",[1424,1425],"tail-sample-decision",{},[641,1427,1428,1504],{},[644,1429,1431],{"className":646,"code":1430,"filename":512,"language":649,"meta":650,"style":650},"sampling: {\n  rates: { info: 10 },\n  keep: [\n    { status: 400 },\n    { duration: 1000 },\n  ],\n}\n",[652,1432,1433,1442,1459,1468,1481,1493,1500],{"__ignoreMap":650},[598,1434,1435,1438,1440],{"class":656,"line":657},[598,1436,1437],{"class":1162},"sampling",[598,1439,686],{"class":675},[598,1441,715],{"class":675},[598,1443,1444,1447,1449,1451,1453,1455,1457],{"class":656,"line":679},[598,1445,1446],{"class":1162},"  rates",[598,1448,686],{"class":675},[598,1450,843],{"class":675},[598,1452,1185],{"class":1162},[598,1454,686],{"class":675},[598,1456,747],{"class":746},[598,1458,1050],{"class":675},[598,1460,1461,1464,1466],{"class":656,"line":707},[598,1462,1463],{"class":1162},"  keep",[598,1465,686],{"class":675},[598,1467,1201],{"class":682},[598,1469,1470,1473,1475,1477,1479],{"class":656,"line":718},[598,1471,1472],{"class":675},"    {",[598,1474,1209],{"class":682},[598,1476,686],{"class":675},[598,1478,1214],{"class":746},[598,1480,1050],{"class":675},[598,1482,1483,1485,1487,1489,1491],{"class":656,"line":728},[598,1484,1472],{"class":675},[598,1486,1227],{"class":682},[598,1488,686],{"class":675},[598,1490,1232],{"class":746},[598,1492,1050],{"class":675},[598,1494,1495,1498],{"class":656,"line":738},[598,1496,1497],{"class":682},"  ]",[598,1499,704],{"class":675},[598,1501,1502],{"class":656,"line":757},[598,1503,1274],{"class":675},[644,1505,1510],{"className":1506,"code":1507,"filename":1508,"language":1509,"meta":650,"style":650},"language-bash shiki shiki-themes material-theme-lighter material-theme material-theme-palenight","POST \u002Fapi\u002Fusers     200  45ms   → 10% chance (head sampling)\nPOST \u002Fapi\u002Fusers     500  45ms   → always kept (status >= 400)\nGET  \u002Fapi\u002Fproducts  200  2300ms → always kept (duration >= 1000)\nPOST \u002Fapi\u002Fcheckout  200  120ms  → 10% chance (head sampling)\n","What gets logged","bash",[652,1511,1512,1542,1574,1606],{"__ignoreMap":650},[598,1513,1514,1517,1520,1523,1526,1529,1532,1535,1538,1540],{"class":656,"line":657},[598,1515,1516],{"class":1162},"POST",[598,1518,1519],{"class":695}," \u002Fapi\u002Fusers",[598,1521,1522],{"class":746},"     200",[598,1524,1525],{"class":695},"  45ms",[598,1527,1528],{"class":695},"   →",[598,1530,1531],{"class":695}," 10%",[598,1533,1534],{"class":695}," chance",[598,1536,1537],{"class":671}," (head ",[598,1539,1437],{"class":695},[598,1541,829],{"class":671},[598,1543,1544,1546,1548,1551,1553,1555,1558,1561,1564,1567,1570,1572],{"class":656,"line":679},[598,1545,1516],{"class":1162},[598,1547,1519],{"class":695},[598,1549,1550],{"class":746},"     500",[598,1552,1525],{"class":695},[598,1554,1528],{"class":695},[598,1556,1557],{"class":695}," always",[598,1559,1560],{"class":695}," kept",[598,1562,1563],{"class":671}," (status ",[598,1565,1566],{"class":675},">",[598,1568,1569],{"class":695},"=",[598,1571,1214],{"class":746},[598,1573,829],{"class":671},[598,1575,1576,1579,1582,1585,1588,1591,1593,1595,1598,1600,1602,1604],{"class":656,"line":707},[598,1577,1578],{"class":1162},"GET",[598,1580,1581],{"class":695},"  \u002Fapi\u002Fproducts",[598,1583,1584],{"class":746},"  200",[598,1586,1587],{"class":695},"  2300ms",[598,1589,1590],{"class":695}," →",[598,1592,1557],{"class":695},[598,1594,1560],{"class":695},[598,1596,1597],{"class":671}," (duration ",[598,1599,1566],{"class":675},[598,1601,1569],{"class":695},[598,1603,1232],{"class":746},[598,1605,829],{"class":671},[598,1607,1608,1610,1613,1615,1618,1621,1623,1625,1627,1629],{"class":656,"line":718},[598,1609,1516],{"class":1162},[598,1611,1612],{"class":695}," \u002Fapi\u002Fcheckout",[598,1614,1584],{"class":746},[598,1616,1617],{"class":695},"  120ms",[598,1619,1620],{"class":695},"  →",[598,1622,1531],{"class":695},[598,1624,1534],{"class":695},[598,1626,1537],{"class":671},[598,1628,1437],{"class":695},[598,1630,829],{"class":671},[625,1632,1634],{"id":1633},"write-your-own-keep-rule","Write your own keep rule",[573,1636,1637,1638,1641,1642,1644],{},"For conditions beyond status, duration, and path, use the ",[652,1639,1640],{},"evlog:emit:keep"," hook in Nuxt\u002FNitro or the ",[652,1643,1399],{}," callback in other frameworks.",[641,1646,1647,1789,1976],{},[644,1648,1651],{"className":646,"code":1649,"filename":1650,"language":649,"meta":650,"style":650},"export default defineNitroPlugin((nitroApp) => {\n  nitroApp.hooks.hook('evlog:emit:keep', (ctx) => {\n    if (ctx.context.user?.plan === 'enterprise') {\n      ctx.shouldKeep = true\n    }\n  })\n})\n","server\u002Fplugins\u002Fsampling.ts (Nuxt)",[652,1652,1653,1677,1715,1755,1771,1776,1783],{"__ignoreMap":650},[598,1654,1655,1657,1659,1662,1664,1666,1670,1672,1675],{"class":656,"line":657},[598,1656,661],{"class":660},[598,1658,664],{"class":660},[598,1660,1661],{"class":667}," defineNitroPlugin",[598,1663,672],{"class":671},[598,1665,672],{"class":675},[598,1667,1669],{"class":1668},"sHdIc","nitroApp",[598,1671,1374],{"class":675},[598,1673,1674],{"class":874}," =>",[598,1676,715],{"class":675},[598,1678,1679,1682,1685,1688,1690,1693,1695,1697,1699,1701,1703,1706,1709,1711,1713],{"class":656,"line":679},[598,1680,1681],{"class":671},"  nitroApp",[598,1683,1684],{"class":675},".",[598,1686,1687],{"class":671},"hooks",[598,1689,1684],{"class":675},[598,1691,1692],{"class":667},"hook",[598,1694,672],{"class":682},[598,1696,692],{"class":675},[598,1698,1640],{"class":695},[598,1700,692],{"class":675},[598,1702,750],{"class":675},[598,1704,1705],{"class":675}," (",[598,1707,1708],{"class":1668},"ctx",[598,1710,1374],{"class":675},[598,1712,1674],{"class":874},[598,1714,715],{"class":675},[598,1716,1717,1720,1722,1724,1726,1729,1731,1734,1737,1740,1743,1745,1748,1750,1753],{"class":656,"line":707},[598,1718,1719],{"class":660},"    if",[598,1721,1705],{"class":682},[598,1723,1708],{"class":671},[598,1725,1684],{"class":675},[598,1727,1728],{"class":671},"context",[598,1730,1684],{"class":675},[598,1732,1733],{"class":671},"user",[598,1735,1736],{"class":675},"?.",[598,1738,1739],{"class":671},"plan",[598,1741,1742],{"class":675}," ===",[598,1744,855],{"class":675},[598,1746,1747],{"class":695},"enterprise",[598,1749,692],{"class":675},[598,1751,1752],{"class":682},") ",[598,1754,676],{"class":675},[598,1756,1757,1760,1762,1765,1767],{"class":656,"line":718},[598,1758,1759],{"class":671},"      ctx",[598,1761,1684],{"class":675},[598,1763,1764],{"class":671},"shouldKeep",[598,1766,890],{"class":675},[598,1768,1770],{"class":1769},"sfNiH"," true\n",[598,1772,1773],{"class":656,"line":728},[598,1774,1775],{"class":675},"    }\n",[598,1777,1778,1781],{"class":656,"line":738},[598,1779,1780],{"class":675},"  }",[598,1782,829],{"class":682},[598,1784,1785,1787],{"class":656,"line":757},[598,1786,826],{"class":675},[598,1788,829],{"class":671},[644,1790,1792],{"className":646,"code":1791,"filename":833,"language":649,"meta":650,"style":650},"import { createEvlog } from 'evlog\u002Fnext'\n\nexport const { withEvlog, useLogger } = createEvlog({\n  service: 'my-app',\n  sampling: {\n    rates: { info: 10 },\n    keep: [{ status: 400 }],\n  },\n  keep(ctx) {\n    if (ctx.context.user?.plan === 'enterprise') {\n      ctx.shouldKeep = true\n    }\n  },\n})\n",[652,1793,1794,1812,1816,1840,1854,1862,1878,1901,1905,1917,1949,1961,1965,1969],{"__ignoreMap":650},[598,1795,1796,1798,1800,1802,1804,1806,1808,1810],{"class":656,"line":657},[598,1797,840],{"class":660},[598,1799,843],{"class":675},[598,1801,846],{"class":671},[598,1803,849],{"class":675},[598,1805,852],{"class":660},[598,1807,855],{"class":675},[598,1809,858],{"class":695},[598,1811,861],{"class":675},[598,1813,1814],{"class":656,"line":679},[598,1815,867],{"emptyLinePlaceholder":866},[598,1817,1818,1820,1822,1824,1826,1828,1830,1832,1834,1836,1838],{"class":656,"line":707},[598,1819,661],{"class":660},[598,1821,875],{"class":874},[598,1823,843],{"class":675},[598,1825,880],{"class":671},[598,1827,750],{"class":675},[598,1829,885],{"class":671},[598,1831,826],{"class":675},[598,1833,890],{"class":675},[598,1835,846],{"class":667},[598,1837,672],{"class":671},[598,1839,676],{"class":675},[598,1841,1842,1844,1846,1848,1850,1852],{"class":656,"line":718},[598,1843,901],{"class":682},[598,1845,686],{"class":675},[598,1847,855],{"class":675},[598,1849,908],{"class":695},[598,1851,692],{"class":675},[598,1853,704],{"class":675},[598,1855,1856,1858,1860],{"class":656,"line":728},[598,1857,917],{"class":682},[598,1859,686],{"class":675},[598,1861,715],{"class":675},[598,1863,1864,1866,1868,1870,1872,1874,1876],{"class":656,"line":738},[598,1865,926],{"class":682},[598,1867,686],{"class":675},[598,1869,843],{"class":675},[598,1871,1185],{"class":682},[598,1873,686],{"class":675},[598,1875,747],{"class":746},[598,1877,1050],{"class":675},[598,1879,1880,1882,1884,1886,1889,1891,1893,1895,1897,1899],{"class":656,"line":757},[598,1881,1196],{"class":682},[598,1883,686],{"class":675},[598,1885,689],{"class":671},[598,1887,1888],{"class":675},"{",[598,1890,1209],{"class":682},[598,1892,686],{"class":675},[598,1894,1214],{"class":746},[598,1896,849],{"class":675},[598,1898,701],{"class":671},[598,1900,704],{"class":675},[598,1902,1903],{"class":656,"line":773},[598,1904,820],{"class":675},[598,1906,1907,1909,1911,1913,1915],{"class":656,"line":789},[598,1908,1463],{"class":682},[598,1910,672],{"class":675},[598,1912,1708],{"class":1668},[598,1914,1374],{"class":675},[598,1916,715],{"class":675},[598,1918,1919,1921,1923,1925,1927,1929,1931,1933,1935,1937,1939,1941,1943,1945,1947],{"class":656,"line":805},[598,1920,1719],{"class":660},[598,1922,1705],{"class":682},[598,1924,1708],{"class":671},[598,1926,1684],{"class":675},[598,1928,1728],{"class":671},[598,1930,1684],{"class":675},[598,1932,1733],{"class":671},[598,1934,1736],{"class":675},[598,1936,1739],{"class":671},[598,1938,1742],{"class":675},[598,1940,855],{"class":675},[598,1942,1747],{"class":695},[598,1944,692],{"class":675},[598,1946,1752],{"class":682},[598,1948,676],{"class":675},[598,1950,1951,1953,1955,1957,1959],{"class":656,"line":811},[598,1952,1759],{"class":671},[598,1954,1684],{"class":675},[598,1956,1764],{"class":671},[598,1958,890],{"class":675},[598,1960,1770],{"class":1769},[598,1962,1963],{"class":656,"line":817},[598,1964,1775],{"class":675},[598,1966,1967],{"class":656,"line":823},[598,1968,820],{"class":675},[598,1970,1972,1974],{"class":656,"line":1971},14,[598,1973,826],{"class":675},[598,1975,829],{"class":671},[644,1977,1980],{"className":646,"code":1978,"filename":1979,"language":649,"meta":650,"style":650},"import { evlog } from 'evlog\u002Fhono'\n\napp.use(evlog({\n  keep(ctx) {\n    if (ctx.context.user?.plan === 'enterprise') {\n      ctx.shouldKeep = true\n    }\n  },\n}))\n","index.ts (Hono)",[652,1981,1982,2002,2006,2024,2036,2068,2080,2084,2088],{"__ignoreMap":650},[598,1983,1984,1986,1988,1991,1993,1995,1997,2000],{"class":656,"line":657},[598,1985,840],{"class":660},[598,1987,843],{"class":675},[598,1989,1990],{"class":671}," evlog",[598,1992,849],{"class":675},[598,1994,852],{"class":660},[598,1996,855],{"class":675},[598,1998,1999],{"class":695},"evlog\u002Fhono",[598,2001,861],{"class":675},[598,2003,2004],{"class":656,"line":679},[598,2005,867],{"emptyLinePlaceholder":866},[598,2007,2008,2011,2013,2016,2018,2020,2022],{"class":656,"line":707},[598,2009,2010],{"class":671},"app",[598,2012,1684],{"class":675},[598,2014,2015],{"class":667},"use",[598,2017,672],{"class":671},[598,2019,1012],{"class":667},[598,2021,672],{"class":671},[598,2023,676],{"class":675},[598,2025,2026,2028,2030,2032,2034],{"class":656,"line":718},[598,2027,1463],{"class":682},[598,2029,672],{"class":675},[598,2031,1708],{"class":1668},[598,2033,1374],{"class":675},[598,2035,715],{"class":675},[598,2037,2038,2040,2042,2044,2046,2048,2050,2052,2054,2056,2058,2060,2062,2064,2066],{"class":656,"line":728},[598,2039,1719],{"class":660},[598,2041,1705],{"class":682},[598,2043,1708],{"class":671},[598,2045,1684],{"class":675},[598,2047,1728],{"class":671},[598,2049,1684],{"class":675},[598,2051,1733],{"class":671},[598,2053,1736],{"class":675},[598,2055,1739],{"class":671},[598,2057,1742],{"class":675},[598,2059,855],{"class":675},[598,2061,1747],{"class":695},[598,2063,692],{"class":675},[598,2065,1752],{"class":682},[598,2067,676],{"class":675},[598,2069,2070,2072,2074,2076,2078],{"class":656,"line":738},[598,2071,1759],{"class":671},[598,2073,1684],{"class":675},[598,2075,1764],{"class":671},[598,2077,890],{"class":675},[598,2079,1770],{"class":1769},[598,2081,2082],{"class":656,"line":757},[598,2083,1775],{"class":675},[598,2085,2086],{"class":656,"line":773},[598,2087,820],{"class":675},[598,2089,2090,2092],{"class":656,"line":789},[598,2091,826],{"class":675},[598,2093,2094],{"class":671},"))\n",[573,2096,2097,2098,2100],{},"The ",[652,2099,1708],{}," object contains:",[1304,2102,2103,2114],{},[1307,2104,2105],{},[1310,2106,2107,2110,2112],{},[1313,2108,2109],{},"Field",[1313,2111,1318],{},[1313,2113,1321],{},[1323,2115,2116,2130,2143,2157,2171,2188],{},[1310,2117,2118,2122,2127],{},[1328,2119,2120],{},[652,2121,1284],{},[1328,2123,2124],{},[652,2125,2126],{},"number | undefined",[1328,2128,2129],{},"HTTP response status",[1310,2131,2132,2136,2140],{},[1328,2133,2134],{},[652,2135,1288],{},[1328,2137,2138],{},[652,2139,2126],{},[1328,2141,2142],{},"Request duration in ms",[1310,2144,2145,2149,2154],{},[1328,2146,2147],{},[652,2148,1292],{},[1328,2150,2151],{},[652,2152,2153],{},"string | undefined",[1328,2155,2156],{},"Request path",[1310,2158,2159,2164,2168],{},[1328,2160,2161],{},[652,2162,2163],{},"method",[1328,2165,2166],{},[652,2167,2153],{},[1328,2169,2170],{},"HTTP method",[1310,2172,2173,2177,2182],{},[1328,2174,2175],{},[652,2176,1728],{},[1328,2178,2179],{},[652,2180,2181],{},"Record\u003Cstring, unknown>",[1328,2183,2184,2185],{},"All fields set via ",[652,2186,2187],{},"log.set()",[1310,2189,2190,2194,2199],{},[1328,2191,2192],{},[652,2193,1764],{},[1328,2195,2196],{},[652,2197,2198],{},"boolean",[1328,2200,2201,2202,2205],{},"Set to ",[652,2203,2204],{},"true"," to force-keep",[625,2207,2209],{"id":2208},"a-configuration-that-ships","A configuration that ships",[573,2211,2212],{},"A typical production configuration that balances cost and visibility:",[641,2214,2215,2470,2675],{},[644,2216,2218],{"className":646,"code":2217,"filename":648,"language":649,"meta":650,"style":650},"export default defineNuxtConfig({\n  modules: ['evlog\u002Fnuxt'],\n  evlog: {\n    env: { service: 'my-app' },\n  },\n  $production: {\n    evlog: {\n      sampling: {\n        rates: {\n          info: 10,\n          warn: 50,\n          debug: 0,\n          error: 100,\n        },\n        keep: [\n          { status: 400 },\n          { duration: 1000 },\n          { path: '\u002Fapi\u002Fpayments\u002F**' },\n          { path: '\u002Fapi\u002Fauth\u002F**' },\n        ],\n      },\n    },\n  },\n})\n",[652,2219,2220,2232,2250,2258,2279,2283,2292,2301,2310,2319,2330,2341,2352,2363,2368,2378,2392,2405,2422,2440,2448,2453,2458,2463],{"__ignoreMap":650},[598,2221,2222,2224,2226,2228,2230],{"class":656,"line":657},[598,2223,661],{"class":660},[598,2225,664],{"class":660},[598,2227,668],{"class":667},[598,2229,672],{"class":671},[598,2231,676],{"class":675},[598,2233,2234,2236,2238,2240,2242,2244,2246,2248],{"class":656,"line":679},[598,2235,683],{"class":682},[598,2237,686],{"class":675},[598,2239,689],{"class":671},[598,2241,692],{"class":675},[598,2243,696],{"class":695},[598,2245,692],{"class":675},[598,2247,701],{"class":671},[598,2249,704],{"class":675},[598,2251,2252,2254,2256],{"class":656,"line":707},[598,2253,710],{"class":682},[598,2255,686],{"class":675},[598,2257,715],{"class":675},[598,2259,2260,2263,2265,2267,2269,2271,2273,2275,2277],{"class":656,"line":718},[598,2261,2262],{"class":682},"    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