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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.",[548,549,552,555,581],"prompt",{":actions":550,"description":551,"icon":64},"[\"copy\",\"cursor\",\"claude\"]","Enable head and tail sampling",[544,553,554],{},"Enable head and tail sampling in my evlog production config.",[556,557,558,562,565,572,575,578],"ul",{},[559,560,561],"li",{},"Identify my framework and locate the evlog config (nuxt.config.ts, lib\u002Fevlog.ts, initLogger, etc.)",[559,563,564],{},"Configure sampling.rates per level: { info: 10, warn: 50, debug: 0, error: 100 } as a starting point",[559,566,567,568],{},"Add sampling.keep rules to force-keep critical events: ",[569,570,571],"span",{},"{ status: 400 }, { duration: 1000 }, { path: '\u002Fapi\u002Fcritical\u002F**' }",[559,573,574],{},"For business-specific keep logic (e.g. premium users), add a custom keep callback or evlog:emit:keep hook",[559,576,577],{},"Wrap sampling in a $production override so dev keeps full logging",[559,579,580],{},"Confirm errors are always kept by default unless I explicitly set error: 0",[544,582,583,584,590,591],{},"Docs: ",[585,586,587],"a",{"href":587,"rel":588},"https:\u002F\u002Fwww.evlog.dev\u002Flearn\u002Fsampling",[589],"nofollow","\nBest practices: ",[585,592,593],{"href":593,"rel":594},"https:\u002F\u002Fwww.evlog.dev\u002Freference\u002Fbest-practices",[589],[596,597,599],"h2",{"id":598},"drop-noise-before-it-is-built","Drop noise before it is built",[544,601,602,603,607],{},"Head sampling randomly keeps a percentage of logs per level. It runs ",[604,605,606],"strong",{},"before"," the request completes, acting as a coin flip at emission time.",[609,610],"head-sampling-plinko",{},[612,613,614,801,960],"code-group",{},[615,616,622],"pre",{"className":617,"code":618,"filename":619,"language":620,"meta":621,"style":621},"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","",[623,624,625,648,676,687,697,707,726,742,758,774,780,786,792],"code",{"__ignoreMap":621},[569,626,629,633,636,640,644],{"class":627,"line":628},"line",1,[569,630,632],{"class":631},"s7zQu","export",[569,634,635],{"class":631}," default",[569,637,639],{"class":638},"s2Zo4"," defineNuxtConfig",[569,641,643],{"class":642},"sTEyZ","(",[569,645,647],{"class":646},"sMK4o","{\n",[569,649,651,655,658,661,664,668,670,673],{"class":627,"line":650},2,[569,652,654],{"class":653},"swJcz","  modules",[569,656,657],{"class":646},":",[569,659,660],{"class":642}," [",[569,662,663],{"class":646},"'",[569,665,667],{"class":666},"sfazB","evlog\u002Fnuxt",[569,669,663],{"class":646},[569,671,672],{"class":642},"]",[569,674,675],{"class":646},",\n",[569,677,679,682,684],{"class":627,"line":678},3,[569,680,681],{"class":653},"  evlog",[569,683,657],{"class":646},[569,685,686],{"class":646}," {\n",[569,688,690,693,695],{"class":627,"line":689},4,[569,691,692],{"class":653},"    sampling",[569,694,657],{"class":646},[569,696,686],{"class":646},[569,698,700,703,705],{"class":627,"line":699},5,[569,701,702],{"class":653},"      rates",[569,704,657],{"class":646},[569,706,686],{"class":646},[569,708,710,713,715,719,722],{"class":627,"line":709},6,[569,711,712],{"class":653},"        info",[569,714,657],{"class":646},[569,716,718],{"class":717},"sbssI"," 10",[569,720,721],{"class":646},",",[569,723,725],{"class":724},"sHwdD","    \u002F\u002F Keep 10% of info logs\n",[569,727,729,732,734,737,739],{"class":627,"line":728},7,[569,730,731],{"class":653},"        warn",[569,733,657],{"class":646},[569,735,736],{"class":717}," 50",[569,738,721],{"class":646},[569,740,741],{"class":724},"    \u002F\u002F Keep 50% of warnings\n",[569,743,745,748,750,753,755],{"class":627,"line":744},8,[569,746,747],{"class":653},"        debug",[569,749,657],{"class":646},[569,751,752],{"class":717}," 0",[569,754,721],{"class":646},[569,756,757],{"class":724},"    \u002F\u002F Drop all debug logs\n",[569,759,761,764,766,769,771],{"class":627,"line":760},9,[569,762,763],{"class":653},"        error",[569,765,657],{"class":646},[569,767,768],{"class":717}," 100",[569,770,721],{"class":646},[569,772,773],{"class":724},"  \u002F\u002F Always keep errors (default)\n",[569,775,777],{"class":627,"line":776},10,[569,778,779],{"class":646},"      },\n",[569,781,783],{"class":627,"line":782},11,[569,784,785],{"class":646},"    },\n",[569,787,789],{"class":627,"line":788},12,[569,790,791],{"class":646},"  },\n",[569,793,795,798],{"class":627,"line":794},13,[569,796,797],{"class":646},"}",[569,799,800],{"class":642},")\n",[615,802,805],{"className":617,"code":803,"filename":804,"language":620,"meta":621,"style":621},"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)",[623,806,807,833,839,868,884,893,902,913,924,935,946,950,954],{"__ignoreMap":621},[569,808,809,812,815,818,821,824,827,830],{"class":627,"line":628},[569,810,811],{"class":631},"import",[569,813,814],{"class":646}," {",[569,816,817],{"class":642}," createEvlog",[569,819,820],{"class":646}," }",[569,822,823],{"class":631}," from",[569,825,826],{"class":646}," '",[569,828,829],{"class":666},"evlog\u002Fnext",[569,831,832],{"class":646},"'\n",[569,834,835],{"class":627,"line":650},[569,836,838],{"emptyLinePlaceholder":837},true,"\n",[569,840,841,843,847,849,852,854,857,859,862,864,866],{"class":627,"line":678},[569,842,632],{"class":631},[569,844,846],{"class":845},"spNyl"," const",[569,848,814],{"class":646},[569,850,851],{"class":642}," withEvlog",[569,853,721],{"class":646},[569,855,856],{"class":642}," useLogger ",[569,858,797],{"class":646},[569,860,861],{"class":646}," =",[569,863,817],{"class":638},[569,865,643],{"class":642},[569,867,647],{"class":646},[569,869,870,873,875,877,880,882],{"class":627,"line":689},[569,871,872],{"class":653},"  service",[569,874,657],{"class":646},[569,876,826],{"class":646},[569,878,879],{"class":666},"my-app",[569,881,663],{"class":646},[569,883,675],{"class":646},[569,885,886,889,891],{"class":627,"line":699},[569,887,888],{"class":653},"  sampling",[569,890,657],{"class":646},[569,892,686],{"class":646},[569,894,895,898,900],{"class":627,"line":709},[569,896,897],{"class":653},"    rates",[569,899,657],{"class":646},[569,901,686],{"class":646},[569,903,904,907,909,911],{"class":627,"line":728},[569,905,906],{"class":653},"      info",[569,908,657],{"class":646},[569,910,718],{"class":717},[569,912,675],{"class":646},[569,914,915,918,920,922],{"class":627,"line":744},[569,916,917],{"class":653},"      warn",[569,919,657],{"class":646},[569,921,736],{"class":717},[569,923,675],{"class":646},[569,925,926,929,931,933],{"class":627,"line":760},[569,927,928],{"class":653},"      debug",[569,930,657],{"class":646},[569,932,752],{"class":717},[569,934,675],{"class":646},[569,936,937,940,942,944],{"class":627,"line":776},[569,938,939],{"class":653},"      error",[569,941,657],{"class":646},[569,943,768],{"class":717},[569,945,675],{"class":646},[569,947,948],{"class":627,"line":782},[569,949,785],{"class":646},[569,951,952],{"class":627,"line":788},[569,953,791],{"class":646},[569,955,956,958],{"class":627,"line":794},[569,957,797],{"class":646},[569,959,800],{"class":642},[615,961,964],{"className":617,"code":962,"filename":963,"language":620,"meta":621,"style":621},"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)",[623,965,966,986,990,999,1022,1030,1038,1048,1058,1068,1078,1082,1086],{"__ignoreMap":621},[569,967,968,970,972,975,977,979,981,984],{"class":627,"line":628},[569,969,811],{"class":631},[569,971,814],{"class":646},[569,973,974],{"class":642}," initLogger",[569,976,820],{"class":646},[569,978,823],{"class":631},[569,980,826],{"class":646},[569,982,983],{"class":666},"evlog",[569,985,832],{"class":646},[569,987,988],{"class":627,"line":650},[569,989,838],{"emptyLinePlaceholder":837},[569,991,992,995,997],{"class":627,"line":678},[569,993,994],{"class":638},"initLogger",[569,996,643],{"class":642},[569,998,647],{"class":646},[569,1000,1001,1004,1006,1008,1011,1013,1015,1017,1019],{"class":627,"line":689},[569,1002,1003],{"class":653},"  env",[569,1005,657],{"class":646},[569,1007,814],{"class":646},[569,1009,1010],{"class":653}," service",[569,1012,657],{"class":646},[569,1014,826],{"class":646},[569,1016,879],{"class":666},[569,1018,663],{"class":646},[569,1020,1021],{"class":646}," },\n",[569,1023,1024,1026,1028],{"class":627,"line":699},[569,1025,888],{"class":653},[569,1027,657],{"class":646},[569,1029,686],{"class":646},[569,1031,1032,1034,1036],{"class":627,"line":709},[569,1033,897],{"class":653},[569,1035,657],{"class":646},[569,1037,686],{"class":646},[569,1039,1040,1042,1044,1046],{"class":627,"line":728},[569,1041,906],{"class":653},[569,1043,657],{"class":646},[569,1045,718],{"class":717},[569,1047,675],{"class":646},[569,1049,1050,1052,1054,1056],{"class":627,"line":744},[569,1051,917],{"class":653},[569,1053,657],{"class":646},[569,1055,736],{"class":717},[569,1057,675],{"class":646},[569,1059,1060,1062,1064,1066],{"class":627,"line":760},[569,1061,928],{"class":653},[569,1063,657],{"class":646},[569,1065,752],{"class":717},[569,1067,675],{"class":646},[569,1069,1070,1072,1074,1076],{"class":627,"line":776},[569,1071,939],{"class":653},[569,1073,657],{"class":646},[569,1075,768],{"class":717},[569,1077,675],{"class":646},[569,1079,1080],{"class":627,"line":782},[569,1081,785],{"class":646},[569,1083,1084],{"class":627,"line":788},[569,1085,791],{"class":646},[569,1087,1088,1090],{"class":627,"line":794},[569,1089,797],{"class":646},[569,1091,800],{"class":642},[544,1093,1094,1095,1098],{},"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 ",[623,1096,1097],{},"error: 0"," to drop errors.",[1100,1101,1103,1104,1107],"callout",{"color":1102,"icon":13},"info","Head sampling is random. A ",[623,1105,1106],{},"10%"," rate means roughly 1 in 10 info logs are kept, not exactly 1 in 10.",[596,1109,1111],{"id":1110},"keep-an-event-once-you-know-its-outcome","Keep an event once you know its outcome",[544,1113,1114,1115,1118],{},"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 ",[604,1116,1117],{},"after"," the request completes and force-keeping logs that match specific conditions.",[615,1120,1122],{"className":617,"code":1121,"filename":619,"language":620,"meta":621,"style":621},"\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",[623,1123,1124,1129,1138,1146,1163,1173,1192,1209,1230,1237,1241],{"__ignoreMap":621},[569,1125,1126],{"class":627,"line":628},[569,1127,1128],{"class":724},"\u002F\u002F Sampling config, works the same across all frameworks\n",[569,1130,1131,1134,1136],{"class":627,"line":650},[569,1132,983],{"class":1133},"sBMFI",[569,1135,657],{"class":646},[569,1137,686],{"class":646},[569,1139,1140,1142,1144],{"class":627,"line":678},[569,1141,888],{"class":1133},[569,1143,657],{"class":646},[569,1145,686],{"class":646},[569,1147,1148,1150,1152,1154,1157,1159,1161],{"class":627,"line":689},[569,1149,897],{"class":1133},[569,1151,657],{"class":646},[569,1153,814],{"class":646},[569,1155,1156],{"class":1133}," info",[569,1158,657],{"class":646},[569,1160,718],{"class":717},[569,1162,1021],{"class":646},[569,1164,1165,1168,1170],{"class":627,"line":699},[569,1166,1167],{"class":1133},"    keep",[569,1169,657],{"class":646},[569,1171,1172],{"class":653}," [\n",[569,1174,1175,1178,1181,1183,1186,1189],{"class":627,"line":709},[569,1176,1177],{"class":646},"      {",[569,1179,1180],{"class":653}," status",[569,1182,657],{"class":646},[569,1184,1185],{"class":717}," 400",[569,1187,1188],{"class":646}," },",[569,1190,1191],{"class":724},"              \u002F\u002F HTTP status >= 400\n",[569,1193,1194,1196,1199,1201,1204,1206],{"class":627,"line":728},[569,1195,1177],{"class":646},[569,1197,1198],{"class":653}," duration",[569,1200,657],{"class":646},[569,1202,1203],{"class":717}," 1000",[569,1205,1188],{"class":646},[569,1207,1208],{"class":724},"           \u002F\u002F Request took >= 1s\n",[569,1210,1211,1213,1216,1218,1220,1223,1225,1227],{"class":627,"line":744},[569,1212,1177],{"class":646},[569,1214,1215],{"class":653}," path",[569,1217,657],{"class":646},[569,1219,826],{"class":646},[569,1221,1222],{"class":666},"\u002Fapi\u002Fpayments\u002F**",[569,1224,663],{"class":646},[569,1226,1188],{"class":646},[569,1228,1229],{"class":724}," \u002F\u002F Critical path (glob)\n",[569,1231,1232,1235],{"class":627,"line":760},[569,1233,1234],{"class":653},"    ]",[569,1236,675],{"class":646},[569,1238,1239],{"class":627,"line":776},[569,1240,791],{"class":646},[569,1242,1243],{"class":627,"line":782},[569,1244,1245],{"class":646},"}\n",[544,1247,1248,1249,1252,1253,1256,1257,1260,1261,1264,1265,1268],{},"Conditions use ",[604,1250,1251],{},">="," comparison for ",[623,1254,1255],{},"status"," and ",[623,1258,1259],{},"duration",", and glob matching for ",[623,1262,1263],{},"path",". If ",[604,1266,1267],{},"any"," condition matches, the log is kept regardless of head sampling (OR logic).",[1270,1271,1273],"h3",{"id":1272},"conditions-you-can-match-on","Conditions you can match on",[1275,1276,1277,1293],"table",{},[1278,1279,1280],"thead",{},[1281,1282,1283,1287,1290],"tr",{},[1284,1285,1286],"th",{},"Condition",[1284,1288,1289],{},"Type",[1284,1291,1292],{},"Description",[1294,1295,1296,1315,1328],"tbody",{},[1281,1297,1298,1303,1308],{},[1299,1300,1301],"td",{},[623,1302,1255],{},[1299,1304,1305],{},[623,1306,1307],{},"number",[1299,1309,1310,1311,1314],{},"Keep if HTTP status >= value (e.g., ",[623,1312,1313],{},"400"," catches all 4xx and 5xx)",[1281,1316,1317,1321,1325],{},[1299,1318,1319],{},[623,1320,1259],{},[1299,1322,1323],{},[623,1324,1307],{},[1299,1326,1327],{},"Keep if request duration >= value in milliseconds",[1281,1329,1330,1334,1339],{},[1299,1331,1332],{},[623,1333,1263],{},[1299,1335,1336],{},[623,1337,1338],{},"string",[1299,1340,1341,1342,1345],{},"Keep if request path matches glob pattern (e.g., ",[623,1343,1344],{},"'\u002Fapi\u002Fcritical\u002F**'",")",[596,1347,1349],{"id":1348},"combine-head-and-tail-sampling","Combine head and tail sampling",[544,1351,1352],{},"The two tiers complement each other:",[1354,1355,1356,1362,1372,1378],"ol",{},[559,1357,1358,1361],{},[604,1359,1360],{},"Request completes"," - evlog knows the status, duration, and path",[559,1363,1364,1367,1368,1371],{},[604,1365,1366],{},"Tail sampling evaluates"," - if any ",[623,1369,1370],{},"keep"," condition matches, the log is force-kept",[559,1373,1374,1377],{},[604,1375,1376],{},"Head sampling applies"," - only if tail sampling didn't force-keep, the random percentage check runs",[559,1379,1380,1383],{},[604,1381,1382],{},"Log emits or drops"," - kept logs go through enrichment and draining as normal",[544,1385,1386,1387,1390,1391,1393],{},"This means a request to ",[623,1388,1389],{},"\u002Fapi\u002Fpayments\u002Fcharge"," that returns a 500 in 2 seconds will always be logged, even if ",[623,1392,1102],{}," is set to 1%. The tail conditions rescue it.",[1395,1396],"tail-sample-decision",{},[612,1398,1399,1475],{},[615,1400,1402],{"className":617,"code":1401,"filename":508,"language":620,"meta":621,"style":621},"sampling: {\n  rates: { info: 10 },\n  keep: [\n    { status: 400 },\n    { duration: 1000 },\n  ],\n}\n",[623,1403,1404,1413,1430,1439,1452,1464,1471],{"__ignoreMap":621},[569,1405,1406,1409,1411],{"class":627,"line":628},[569,1407,1408],{"class":1133},"sampling",[569,1410,657],{"class":646},[569,1412,686],{"class":646},[569,1414,1415,1418,1420,1422,1424,1426,1428],{"class":627,"line":650},[569,1416,1417],{"class":1133},"  rates",[569,1419,657],{"class":646},[569,1421,814],{"class":646},[569,1423,1156],{"class":1133},[569,1425,657],{"class":646},[569,1427,718],{"class":717},[569,1429,1021],{"class":646},[569,1431,1432,1435,1437],{"class":627,"line":678},[569,1433,1434],{"class":1133},"  keep",[569,1436,657],{"class":646},[569,1438,1172],{"class":653},[569,1440,1441,1444,1446,1448,1450],{"class":627,"line":689},[569,1442,1443],{"class":646},"    {",[569,1445,1180],{"class":653},[569,1447,657],{"class":646},[569,1449,1185],{"class":717},[569,1451,1021],{"class":646},[569,1453,1454,1456,1458,1460,1462],{"class":627,"line":699},[569,1455,1443],{"class":646},[569,1457,1198],{"class":653},[569,1459,657],{"class":646},[569,1461,1203],{"class":717},[569,1463,1021],{"class":646},[569,1465,1466,1469],{"class":627,"line":709},[569,1467,1468],{"class":653},"  ]",[569,1470,675],{"class":646},[569,1472,1473],{"class":627,"line":728},[569,1474,1245],{"class":646},[615,1476,1481],{"className":1477,"code":1478,"filename":1479,"language":1480,"meta":621,"style":621},"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",[623,1482,1483,1513,1545,1577],{"__ignoreMap":621},[569,1484,1485,1488,1491,1494,1497,1500,1503,1506,1509,1511],{"class":627,"line":628},[569,1486,1487],{"class":1133},"POST",[569,1489,1490],{"class":666}," \u002Fapi\u002Fusers",[569,1492,1493],{"class":717},"     200",[569,1495,1496],{"class":666},"  45ms",[569,1498,1499],{"class":666},"   →",[569,1501,1502],{"class":666}," 10%",[569,1504,1505],{"class":666}," chance",[569,1507,1508],{"class":642}," (head ",[569,1510,1408],{"class":666},[569,1512,800],{"class":642},[569,1514,1515,1517,1519,1522,1524,1526,1529,1532,1535,1538,1541,1543],{"class":627,"line":650},[569,1516,1487],{"class":1133},[569,1518,1490],{"class":666},[569,1520,1521],{"class":717},"     500",[569,1523,1496],{"class":666},[569,1525,1499],{"class":666},[569,1527,1528],{"class":666}," always",[569,1530,1531],{"class":666}," kept",[569,1533,1534],{"class":642}," (status ",[569,1536,1537],{"class":646},">",[569,1539,1540],{"class":666},"=",[569,1542,1185],{"class":717},[569,1544,800],{"class":642},[569,1546,1547,1550,1553,1556,1559,1562,1564,1566,1569,1571,1573,1575],{"class":627,"line":678},[569,1548,1549],{"class":1133},"GET",[569,1551,1552],{"class":666},"  \u002Fapi\u002Fproducts",[569,1554,1555],{"class":717},"  200",[569,1557,1558],{"class":666},"  2300ms",[569,1560,1561],{"class":666}," →",[569,1563,1528],{"class":666},[569,1565,1531],{"class":666},[569,1567,1568],{"class":642}," (duration ",[569,1570,1537],{"class":646},[569,1572,1540],{"class":666},[569,1574,1203],{"class":717},[569,1576,800],{"class":642},[569,1578,1579,1581,1584,1586,1589,1592,1594,1596,1598,1600],{"class":627,"line":689},[569,1580,1487],{"class":1133},[569,1582,1583],{"class":666}," \u002Fapi\u002Fcheckout",[569,1585,1555],{"class":717},[569,1587,1588],{"class":666},"  120ms",[569,1590,1591],{"class":666},"  →",[569,1593,1502],{"class":666},[569,1595,1505],{"class":666},[569,1597,1508],{"class":642},[569,1599,1408],{"class":666},[569,1601,800],{"class":642},[596,1603,1605],{"id":1604},"write-your-own-keep-rule","Write your own keep rule",[544,1607,1608,1609,1612,1613,1615],{},"For conditions beyond status, duration, and path, use the ",[623,1610,1611],{},"evlog:emit:keep"," hook in Nuxt\u002FNitro or the ",[623,1614,1370],{}," callback in other frameworks.",[612,1617,1618,1760,1947],{},[615,1619,1622],{"className":617,"code":1620,"filename":1621,"language":620,"meta":621,"style":621},"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)",[623,1623,1624,1648,1686,1726,1742,1747,1754],{"__ignoreMap":621},[569,1625,1626,1628,1630,1633,1635,1637,1641,1643,1646],{"class":627,"line":628},[569,1627,632],{"class":631},[569,1629,635],{"class":631},[569,1631,1632],{"class":638}," defineNitroPlugin",[569,1634,643],{"class":642},[569,1636,643],{"class":646},[569,1638,1640],{"class":1639},"sHdIc","nitroApp",[569,1642,1345],{"class":646},[569,1644,1645],{"class":845}," =>",[569,1647,686],{"class":646},[569,1649,1650,1653,1656,1659,1661,1664,1666,1668,1670,1672,1674,1677,1680,1682,1684],{"class":627,"line":650},[569,1651,1652],{"class":642},"  nitroApp",[569,1654,1655],{"class":646},".",[569,1657,1658],{"class":642},"hooks",[569,1660,1655],{"class":646},[569,1662,1663],{"class":638},"hook",[569,1665,643],{"class":653},[569,1667,663],{"class":646},[569,1669,1611],{"class":666},[569,1671,663],{"class":646},[569,1673,721],{"class":646},[569,1675,1676],{"class":646}," (",[569,1678,1679],{"class":1639},"ctx",[569,1681,1345],{"class":646},[569,1683,1645],{"class":845},[569,1685,686],{"class":646},[569,1687,1688,1691,1693,1695,1697,1700,1702,1705,1708,1711,1714,1716,1719,1721,1724],{"class":627,"line":678},[569,1689,1690],{"class":631},"    if",[569,1692,1676],{"class":653},[569,1694,1679],{"class":642},[569,1696,1655],{"class":646},[569,1698,1699],{"class":642},"context",[569,1701,1655],{"class":646},[569,1703,1704],{"class":642},"user",[569,1706,1707],{"class":646},"?.",[569,1709,1710],{"class":642},"plan",[569,1712,1713],{"class":646}," ===",[569,1715,826],{"class":646},[569,1717,1718],{"class":666},"enterprise",[569,1720,663],{"class":646},[569,1722,1723],{"class":653},") ",[569,1725,647],{"class":646},[569,1727,1728,1731,1733,1736,1738],{"class":627,"line":689},[569,1729,1730],{"class":642},"      ctx",[569,1732,1655],{"class":646},[569,1734,1735],{"class":642},"shouldKeep",[569,1737,861],{"class":646},[569,1739,1741],{"class":1740},"sfNiH"," true\n",[569,1743,1744],{"class":627,"line":699},[569,1745,1746],{"class":646},"    }\n",[569,1748,1749,1752],{"class":627,"line":709},[569,1750,1751],{"class":646},"  }",[569,1753,800],{"class":653},[569,1755,1756,1758],{"class":627,"line":728},[569,1757,797],{"class":646},[569,1759,800],{"class":642},[615,1761,1763],{"className":617,"code":1762,"filename":804,"language":620,"meta":621,"style":621},"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",[623,1764,1765,1783,1787,1811,1825,1833,1849,1872,1876,1888,1920,1932,1936,1940],{"__ignoreMap":621},[569,1766,1767,1769,1771,1773,1775,1777,1779,1781],{"class":627,"line":628},[569,1768,811],{"class":631},[569,1770,814],{"class":646},[569,1772,817],{"class":642},[569,1774,820],{"class":646},[569,1776,823],{"class":631},[569,1778,826],{"class":646},[569,1780,829],{"class":666},[569,1782,832],{"class":646},[569,1784,1785],{"class":627,"line":650},[569,1786,838],{"emptyLinePlaceholder":837},[569,1788,1789,1791,1793,1795,1797,1799,1801,1803,1805,1807,1809],{"class":627,"line":678},[569,1790,632],{"class":631},[569,1792,846],{"class":845},[569,1794,814],{"class":646},[569,1796,851],{"class":642},[569,1798,721],{"class":646},[569,1800,856],{"class":642},[569,1802,797],{"class":646},[569,1804,861],{"class":646},[569,1806,817],{"class":638},[569,1808,643],{"class":642},[569,1810,647],{"class":646},[569,1812,1813,1815,1817,1819,1821,1823],{"class":627,"line":689},[569,1814,872],{"class":653},[569,1816,657],{"class":646},[569,1818,826],{"class":646},[569,1820,879],{"class":666},[569,1822,663],{"class":646},[569,1824,675],{"class":646},[569,1826,1827,1829,1831],{"class":627,"line":699},[569,1828,888],{"class":653},[569,1830,657],{"class":646},[569,1832,686],{"class":646},[569,1834,1835,1837,1839,1841,1843,1845,1847],{"class":627,"line":709},[569,1836,897],{"class":653},[569,1838,657],{"class":646},[569,1840,814],{"class":646},[569,1842,1156],{"class":653},[569,1844,657],{"class":646},[569,1846,718],{"class":717},[569,1848,1021],{"class":646},[569,1850,1851,1853,1855,1857,1860,1862,1864,1866,1868,1870],{"class":627,"line":728},[569,1852,1167],{"class":653},[569,1854,657],{"class":646},[569,1856,660],{"class":642},[569,1858,1859],{"class":646},"{",[569,1861,1180],{"class":653},[569,1863,657],{"class":646},[569,1865,1185],{"class":717},[569,1867,820],{"class":646},[569,1869,672],{"class":642},[569,1871,675],{"class":646},[569,1873,1874],{"class":627,"line":744},[569,1875,791],{"class":646},[569,1877,1878,1880,1882,1884,1886],{"class":627,"line":760},[569,1879,1434],{"class":653},[569,1881,643],{"class":646},[569,1883,1679],{"class":1639},[569,1885,1345],{"class":646},[569,1887,686],{"class":646},[569,1889,1890,1892,1894,1896,1898,1900,1902,1904,1906,1908,1910,1912,1914,1916,1918],{"class":627,"line":776},[569,1891,1690],{"class":631},[569,1893,1676],{"class":653},[569,1895,1679],{"class":642},[569,1897,1655],{"class":646},[569,1899,1699],{"class":642},[569,1901,1655],{"class":646},[569,1903,1704],{"class":642},[569,1905,1707],{"class":646},[569,1907,1710],{"class":642},[569,1909,1713],{"class":646},[569,1911,826],{"class":646},[569,1913,1718],{"class":666},[569,1915,663],{"class":646},[569,1917,1723],{"class":653},[569,1919,647],{"class":646},[569,1921,1922,1924,1926,1928,1930],{"class":627,"line":782},[569,1923,1730],{"class":642},[569,1925,1655],{"class":646},[569,1927,1735],{"class":642},[569,1929,861],{"class":646},[569,1931,1741],{"class":1740},[569,1933,1934],{"class":627,"line":788},[569,1935,1746],{"class":646},[569,1937,1938],{"class":627,"line":794},[569,1939,791],{"class":646},[569,1941,1943,1945],{"class":627,"line":1942},14,[569,1944,797],{"class":646},[569,1946,800],{"class":642},[615,1948,1951],{"className":617,"code":1949,"filename":1950,"language":620,"meta":621,"style":621},"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)",[623,1952,1953,1973,1977,1995,2007,2039,2051,2055,2059],{"__ignoreMap":621},[569,1954,1955,1957,1959,1962,1964,1966,1968,1971],{"class":627,"line":628},[569,1956,811],{"class":631},[569,1958,814],{"class":646},[569,1960,1961],{"class":642}," evlog",[569,1963,820],{"class":646},[569,1965,823],{"class":631},[569,1967,826],{"class":646},[569,1969,1970],{"class":666},"evlog\u002Fhono",[569,1972,832],{"class":646},[569,1974,1975],{"class":627,"line":650},[569,1976,838],{"emptyLinePlaceholder":837},[569,1978,1979,1982,1984,1987,1989,1991,1993],{"class":627,"line":678},[569,1980,1981],{"class":642},"app",[569,1983,1655],{"class":646},[569,1985,1986],{"class":638},"use",[569,1988,643],{"class":642},[569,1990,983],{"class":638},[569,1992,643],{"class":642},[569,1994,647],{"class":646},[569,1996,1997,1999,2001,2003,2005],{"class":627,"line":689},[569,1998,1434],{"class":653},[569,2000,643],{"class":646},[569,2002,1679],{"class":1639},[569,2004,1345],{"class":646},[569,2006,686],{"class":646},[569,2008,2009,2011,2013,2015,2017,2019,2021,2023,2025,2027,2029,2031,2033,2035,2037],{"class":627,"line":699},[569,2010,1690],{"class":631},[569,2012,1676],{"class":653},[569,2014,1679],{"class":642},[569,2016,1655],{"class":646},[569,2018,1699],{"class":642},[569,2020,1655],{"class":646},[569,2022,1704],{"class":642},[569,2024,1707],{"class":646},[569,2026,1710],{"class":642},[569,2028,1713],{"class":646},[569,2030,826],{"class":646},[569,2032,1718],{"class":666},[569,2034,663],{"class":646},[569,2036,1723],{"class":653},[569,2038,647],{"class":646},[569,2040,2041,2043,2045,2047,2049],{"class":627,"line":709},[569,2042,1730],{"class":642},[569,2044,1655],{"class":646},[569,2046,1735],{"class":642},[569,2048,861],{"class":646},[569,2050,1741],{"class":1740},[569,2052,2053],{"class":627,"line":728},[569,2054,1746],{"class":646},[569,2056,2057],{"class":627,"line":744},[569,2058,791],{"class":646},[569,2060,2061,2063],{"class":627,"line":760},[569,2062,797],{"class":646},[569,2064,2065],{"class":642},"))\n",[544,2067,2068,2069,2071],{},"The ",[623,2070,1679],{}," object contains:",[1275,2073,2074,2085],{},[1278,2075,2076],{},[1281,2077,2078,2081,2083],{},[1284,2079,2080],{},"Field",[1284,2082,1289],{},[1284,2084,1292],{},[1294,2086,2087,2101,2114,2128,2142,2159],{},[1281,2088,2089,2093,2098],{},[1299,2090,2091],{},[623,2092,1255],{},[1299,2094,2095],{},[623,2096,2097],{},"number | undefined",[1299,2099,2100],{},"HTTP response status",[1281,2102,2103,2107,2111],{},[1299,2104,2105],{},[623,2106,1259],{},[1299,2108,2109],{},[623,2110,2097],{},[1299,2112,2113],{},"Request duration in ms",[1281,2115,2116,2120,2125],{},[1299,2117,2118],{},[623,2119,1263],{},[1299,2121,2122],{},[623,2123,2124],{},"string | undefined",[1299,2126,2127],{},"Request path",[1281,2129,2130,2135,2139],{},[1299,2131,2132],{},[623,2133,2134],{},"method",[1299,2136,2137],{},[623,2138,2124],{},[1299,2140,2141],{},"HTTP method",[1281,2143,2144,2148,2153],{},[1299,2145,2146],{},[623,2147,1699],{},[1299,2149,2150],{},[623,2151,2152],{},"Record\u003Cstring, unknown>",[1299,2154,2155,2156],{},"All fields set via ",[623,2157,2158],{},"log.set()",[1281,2160,2161,2165,2170],{},[1299,2162,2163],{},[623,2164,1735],{},[1299,2166,2167],{},[623,2168,2169],{},"boolean",[1299,2171,2172,2173,2176],{},"Set to ",[623,2174,2175],{},"true"," to force-keep",[596,2178,2180],{"id":2179},"a-configuration-that-ships","A configuration that ships",[544,2182,2183],{},"A typical production configuration that balances cost and visibility:",[612,2185,2186,2441,2646],{},[615,2187,2189],{"className":617,"code":2188,"filename":619,"language":620,"meta":621,"style":621},"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",[623,2190,2191,2203,2221,2229,2250,2254,2263,2272,2281,2290,2301,2312,2323,2334,2339,2349,2363,2376,2393,2411,2419,2424,2429,2434],{"__ignoreMap":621},[569,2192,2193,2195,2197,2199,2201],{"class":627,"line":628},[569,2194,632],{"class":631},[569,2196,635],{"class":631},[569,2198,639],{"class":638},[569,2200,643],{"class":642},[569,2202,647],{"class":646},[569,2204,2205,2207,2209,2211,2213,2215,2217,2219],{"class":627,"line":650},[569,2206,654],{"class":653},[569,2208,657],{"class":646},[569,2210,660],{"class":642},[569,2212,663],{"class":646},[569,2214,667],{"class":666},[569,2216,663],{"class":646},[569,2218,672],{"class":642},[569,2220,675],{"class":646},[569,2222,2223,2225,2227],{"class":627,"line":678},[569,2224,681],{"class":653},[569,2226,657],{"class":646},[569,2228,686],{"class":646},[569,2230,2231,2234,2236,2238,2240,2242,2244,2246,2248],{"class":627,"line":689},[569,2232,2233],{"class":653},"    env",[569,2235,657],{"class":646},[569,2237,814],{"class":646},[569,2239,1010],{"class":653},[569,2241,657],{"class":646},[569,2243,826],{"class":646},[569,2245,879],{"class":666},[569,2247,663],{"class":646},[569,2249,1021],{"class":646},[569,2251,2252],{"class":627,"line":699},[569,2253,791],{"class":646},[569,2255,2256,2259,2261],{"class":627,"line":709},[569,2257,2258],{"class":653},"  $production",[569,2260,657],{"class":646},[569,2262,686],{"class":646},[569,2264,2265,2268,2270],{"class":627,"line":728},[569,2266,2267],{"class":653},"    evlog",[569,2269,657],{"class":646},[569,2271,686],{"class":646},[569,2273,2274,2277,2279],{"class":627,"line":744},[569,2275,2276],{"class":653},"      sampling",[569,2278,657],{"class":646},[569,2280,686],{"class":646},[569,2282,2283,2286,2288],{"class":627,"line":760},[569,2284,2285],{"class":653},"        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