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",[611,1182,1183],{},"level",", ",[611,1186,1187],{},"time",[611,1189,1190],{},"pid",[611,1192,1193],{},"hostname",[611,1195,1196],{},"method",[611,1198,1199],{},"path",", and ",[611,1202,1203],{},"requestId"," are written four times by pino and once by evlog, and the four ",[611,1206,1207],{},"msg"," strings disappear entirely. The fields you actually set are written once either way.",[1210,1211,1214,1215,1218],"callout",{"color":1212,"icon":1213},"warning","i-lucide-alert-triangle","Your ratio is not this ratio. A handler that logs two lines saves less; one that repeats a large ",[611,1216,1217],{},"user"," object on every line saves more. The method transfers, the number does not.",[581,1220,1222],{"id":1221},"which-number-moves-your-bill","Which number moves your bill",[574,1224,1225],{},"Providers meter logs in one of two ways, and that decides which saving you actually collect.",[1118,1227,1228,1241],{},[1121,1229,1230],{},[1124,1231,1232,1235,1238],{},[1127,1233,1234],{},"Metered by",[1127,1236,1237],{},"Saving you collect",[1127,1239,1240],{},"Providers",[1137,1242,1243,1258],{},[1124,1244,1245,1248,1255],{},[1142,1246,1247],{},"Gigabytes ingested",[1142,1249,1250,1251,1254],{},"The ",[1170,1252,1253],{},"56%"," byte figure",[1142,1256,1257],{},"Grafana Cloud, Sentry, PostHog, Better Stack, Axiom",[1124,1259,1260,1267,1273],{},[1142,1261,1262,1263,1266],{},"Gigabytes ",[1170,1264,1265],{},"and"," indexed events",[1142,1268,1250,1269,1272],{},[1170,1270,1271],{},"75%"," event figure, on the line item that usually dominates",[1142,1274,176],{},[574,1276,1277],{},"Per-gigabyte billing is the common case, so most teams collect the byte saving. Datadog is the outlier worth checking: it bills ingestion per gigabyte and indexing per million events, and at production volumes the indexing line is the larger of the two, so the event count is what moves.",[574,1279,1280],{},"Rates were read on 14 August 2026 and are list prices, before free tiers, committed-use discounts, and retention add-ons. They are inputs in the calculator above for exactly that reason.",[581,1282,1284],{"id":1283},"sampling-moves-both-columns","Sampling moves both columns",[574,1286,1287],{},"The calculator applies sampling to both shapes, which is the only fair way to model it. Dropping events is not something evlog does and other loggers cannot: you can filter by level in any logger, or sample in the transport. Applying it to one side only would flatter evlog with a saving that is not evlog's. Pull the slider down and both bills fall together while the gap between them holds.",[574,1289,1290,1291,1293],{},"It is still the larger lever. Consolidation is bounded, because you cannot send fewer than one event per request. ",[596,1292,61],{"href":62}," is not: head sampling drops events by level at emit time, and tail sampling force-keeps the ones you would have wanted, so errors and slow requests survive a rule that discards the rest. Volume stops tracking traffic and starts tracking signal, which is the only version of this that keeps working as you grow.",[574,1295,1296],{},"What evlog changes is the unit sampling operates on. Dropping a line loses part of a request; dropping an event loses a whole one, and keeping an event keeps all of it.",[581,1298,1300],{"id":1299},"ask-it-from-your-editor","Ask it from your editor",[574,1302,1303,1304,1307],{},"The same calculation is an MCP tool on this site's server, so an assistant connected to ",[611,1305,1306],{},"https:\u002F\u002Fevlog.dev\u002Fmcp"," can answer it directly:",[603,1309,1314],{"className":1310,"code":1312,"language":1313},[1311],"language-text","estimate-log-cost({ requestsPerMonth: 10000000, linesPerRequest: 4, provider: \"datadog\" })\n","text",[611,1315,1312],{"__ignoreMap":609},[574,1317,1318,1319,1322,1323,1326],{},"It returns both shapes, the saving, and the basis it used: the measured byte counts, which rates it applied, and the date those rates were read. Pass ",[611,1320,1321],{},"perGb"," and ",[611,1324,1325],{},"perMillionIndexed"," to price a provider that is not in the list, or to correct one whose pricing has moved.",[581,1328,1330],{"id":1329},"next","Next",[1332,1333,1334,1340,1345],"ul",{},[1335,1336,1337,1339],"li",{},[596,1338,61],{"href":62},": the two tiers, and what each one costs you in visibility",[1335,1341,1342,1344],{},[596,1343,378],{"href":517},": the benchmarks these byte counts come from",[1335,1346,1347,1350],{},[596,1348,1349],{"href":148},"Drain adapters",": every destination, and how to change your mind later",[1352,1353,1354],"style",{},"html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .sbssI, html code.shiki .sbssI{--shiki-light:#F76D47;--shiki-default:#F78C6C;--shiki-dark:#F78C6C}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}",{"title":609,"searchDepth":694,"depth":694,"links":1356},[1357,1358,1359,1360,1361,1362],{"id":583,"depth":694,"text":584},{"id":590,"depth":694,"text":591},{"id":1221,"depth":694,"text":1222},{"id":1283,"depth":694,"text":1284},{"id":1299,"depth":694,"text":1300},{"id":1329,"depth":694,"text":1330},"One request leaves one event instead of four lines: 56% fewer bytes, 75% fewer events. Which number moves your bill depends on your provider.","md",[1366,1369],{"label":378,"icon":107,"to":517,"color":1367,"variant":1368},"neutral","subtle",{"label":61,"icon":64,"to":62,"color":1367,"variant":1368},{},{"title":538,"icon":541},{"title":569,"description":1363},"w2zIB3Tb0pcig-UrCNo5CGO0unYGjQpcMHLEkXmcDI8",[1375,1377],{"title":534,"path":535,"stem":536,"description":1376,"icon":438,"children":-1},"AI-assisted code review and evlog adoption using Agent Skills. Let AI review your logging patterns and guide migration to wide events.",{"title":548,"path":549,"stem":550,"description":1378,"icon":532,"children":-1},"Compare request context, serializers, transports, and migration costs before moving a Pino application to evlog.",1788921631420]