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",[620,1191,1192],{},"level",", ",[620,1195,1196],{},"time",[620,1198,1199],{},"pid",[620,1201,1202],{},"hostname",[620,1204,1205],{},"method",[620,1207,1208],{},"path",", and ",[620,1211,1212],{},"requestId"," are written four times by pino and once by evlog, and the four ",[620,1215,1216],{},"msg"," strings disappear entirely. The fields you actually set are written once either way.",[1219,1220,1223,1224,1227],"callout",{"color":1221,"icon":1222},"warning","i-lucide-alert-triangle","Your ratio is not this ratio. A handler that logs two lines saves less; one that repeats a large ",[620,1225,1226],{},"user"," object on every line saves more. The method transfers, the number does not.",[590,1229,1231],{"id":1230},"which-number-moves-your-bill","Which number moves your bill",[583,1233,1234],{},"Providers meter logs in one of two ways, and that decides which saving you actually collect.",[1127,1236,1237,1250],{},[1130,1238,1239],{},[1133,1240,1241,1244,1247],{},[1136,1242,1243],{},"Metered by",[1136,1245,1246],{},"Saving you collect",[1136,1248,1249],{},"Providers",[1146,1251,1252,1267],{},[1133,1253,1254,1257,1264],{},[1151,1255,1256],{},"Gigabytes ingested",[1151,1258,1259,1260,1263],{},"The ",[1179,1261,1262],{},"56%"," byte figure",[1151,1265,1266],{},"Grafana Cloud, Sentry, PostHog, Better Stack, Axiom",[1133,1268,1269,1276,1282],{},[1151,1270,1271,1272,1275],{},"Gigabytes ",[1179,1273,1274],{},"and"," indexed events",[1151,1277,1259,1278,1281],{},[1179,1279,1280],{},"75%"," event figure, on the line item that usually dominates",[1151,1283,181],{},[583,1285,1286],{},"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.",[583,1288,1289],{},"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.",[590,1291,1293],{"id":1292},"sampling-moves-both-columns","Sampling moves both columns",[583,1295,1296],{},"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.",[583,1298,1299,1300,1302],{},"It is still the larger lever. Consolidation is bounded, because you cannot send fewer than one event per request. ",[605,1301,66],{"href":67}," 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.",[583,1304,1305],{},"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.",[590,1307,1309],{"id":1308},"ask-it-from-your-editor","Ask it from your editor",[583,1311,1312,1313,1316],{},"The same calculation is an MCP tool on this site's server, so an assistant connected to ",[620,1314,1315],{},"https:\u002F\u002Fevlog.dev\u002Fmcp"," can answer it directly:",[612,1318,1323],{"className":1319,"code":1321,"language":1322},[1320],"language-text","estimate-log-cost({ requestsPerMonth: 10000000, linesPerRequest: 4, provider: \"datadog\" })\n","text",[620,1324,1321],{"__ignoreMap":618},[583,1326,1327,1328,1331,1332,1335],{},"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 ",[620,1329,1330],{},"perGb"," and ",[620,1333,1334],{},"perMillionIndexed"," to price a provider that is not in the list, or to correct one whose pricing has moved.",[590,1337,1339],{"id":1338},"next","Next",[1341,1342,1343,1349,1354],"ul",{},[1344,1345,1346,1348],"li",{},[605,1347,66],{"href":67},": the two tiers, and what each one costs you in visibility",[1344,1350,1351,1353],{},[605,1352,383],{"href":526},": the benchmarks these byte counts come from",[1344,1355,1356,1359],{},[605,1357,1358],{"href":153},"Drain adapters",": every destination, and how to change your mind later",[1361,1362,1363],"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":618,"searchDepth":703,"depth":703,"links":1365},[1366,1367,1368,1369,1370,1371],{"id":592,"depth":703,"text":593},{"id":599,"depth":703,"text":600},{"id":1230,"depth":703,"text":1231},{"id":1292,"depth":703,"text":1293},{"id":1308,"depth":703,"text":1309},{"id":1338,"depth":703,"text":1339},"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",[1375,1378],{"label":383,"icon":112,"to":526,"color":1376,"variant":1377},"neutral","subtle",{"label":66,"icon":69,"to":67,"color":1376,"variant":1377},{},{"title":547,"icon":550},{"title":578,"description":1372},"w2zIB3Tb0pcig-UrCNo5CGO0unYGjQpcMHLEkXmcDI8",[1384,1386],{"title":543,"path":544,"stem":545,"description":1385,"icon":443,"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":557,"path":558,"stem":559,"description":1387,"icon":541,"children":-1},"Compare request context, serializers, transports, and migration costs before moving a Pino application to evlog.",1789317464234]