diff --git a/.github/workflows/preview-image.yml b/.github/workflows/preview-image.yml
index ee81a6911f..b650cf89a3 100644
--- a/.github/workflows/preview-image.yml
+++ b/.github/workflows/preview-image.yml
@@ -44,10 +44,10 @@ jobs:
           node-version: ${{ env.NODE_VERSION }}
           cache: 'yarn'
 
-      - name: Install Dependencies
-        run: |
-          npm install --global --force yarn@1.22.22
-          yarn cache clean && yarn --frozen-lockfile --network-concurrency 1
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+        with:
+          platforms: arm64
 
       - name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
@@ -58,6 +58,11 @@ jobs:
           username: ${{ vars.DOCKER_USER }}
           password: ${{ secrets.DOCKER_PASS }}
 
+      - name: Install Dependencies
+        run: |
+          npm install --global --force yarn@1.22.22
+          yarn cache clean && yarn --frozen-lockfile --network-concurrency 1
+
       - name: Set version
         id: version
         run: |
@@ -66,6 +71,7 @@ jobs:
           VERSION_TAG=$(jq -r .version package.json)
           echo "VERSION_TAG=$VERSION_TAG" >> "$GITHUB_OUTPUT"
 
+      # TODO: We can use GitHub Actions's matrix option to reduce the build time.
       - name: Build and push preview image to Docker Hub
         uses: docker/build-push-action@v4
         with:
@@ -76,9 +82,9 @@ jobs:
           context: .
           build-args: |
             test_all_deps=true
-          cache-from: type=gha
-          cache-to: type=gha,mode=max
-          platforms: linux/amd64
+          cache-from: type=gha,scope=multi-platform
+          cache-to: type=gha,mode=max,scope=multi-platform
+          platforms: linux/amd64,linux/arm64
         env:
           DOCKER_CONTENT_TRUST: true
 
diff --git a/.gitignore b/.gitignore
index b324689c96..3fba4897ec 100644
--- a/.gitignore
+++ b/.gitignore
@@ -17,6 +17,7 @@ client/dist
 _build
 .vscode
 .env
+.tool-versions
 
 dump.rdb
 
diff --git a/Dockerfile b/Dockerfile
index 48d91528b0..d7258a9c0d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:18-bookworm as frontend-builder
+FROM node:18-bookworm AS frontend-builder
 
 RUN npm install --global --force yarn@1.22.22
 
@@ -20,6 +20,9 @@ COPY --chown=redash scripts /frontend/scripts
 ARG code_coverage
 ENV BABEL_ENV=${code_coverage:+test}
 
+# Avoid issues caused by lags in disk and network I/O speeds when working on top of QEMU emulation for multi-platform image building.
+RUN yarn config set network-timeout 300000
+
 RUN if [ "x$skip_frontend_build" = "x" ] ; then yarn --frozen-lockfile --network-concurrency 1; fi
 
 COPY --chown=redash client /frontend/client
@@ -86,6 +89,9 @@ ENV POETRY_HOME=/etc/poetry
 ENV POETRY_VIRTUALENVS_CREATE=false
 RUN curl -sSL https://install.python-poetry.org | python3 -
 
+# Avoid crashes, including corrupted cache artifacts, when building multi-platform images with GitHub Actions.
+RUN /etc/poetry/bin/poetry cache clear pypi --all
+
 COPY pyproject.toml poetry.lock ./
 
 ARG POETRY_OPTIONS="--no-root --no-interaction --no-ansi"
diff --git a/client/app/components/proptypes.js b/client/app/components/proptypes.js
index e491b36166..1a936e3282 100644
--- a/client/app/components/proptypes.js
+++ b/client/app/components/proptypes.js
@@ -65,6 +65,7 @@ export const Query = PropTypes.shape({
 
 export const AlertOptions = PropTypes.shape({
   column: PropTypes.string,
+  selector: PropTypes.oneOf(["first", "min", "max"]),
   op: PropTypes.oneOf([">", ">=", "<", "<=", "==", "!="]),
   value: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
   custom_subject: PropTypes.string,
@@ -83,6 +84,7 @@ export const Alert = PropTypes.shape({
   query: Query,
   options: PropTypes.shape({
     column: PropTypes.string,
+    selector: PropTypes.string,
     op: PropTypes.string,
     value: PropTypes.oneOfType([PropTypes.string, PropTypes.number]),
   }).isRequired,
diff --git a/client/app/pages/alert/Alert.jsx b/client/app/pages/alert/Alert.jsx
index e54ebcb0e6..877646b611 100644
--- a/client/app/pages/alert/Alert.jsx
+++ b/client/app/pages/alert/Alert.jsx
@@ -16,6 +16,7 @@ import MenuButton from "./components/MenuButton";
 import AlertView from "./AlertView";
 import AlertEdit from "./AlertEdit";
 import AlertNew from "./AlertNew";
+import notifications from "@/services/notifications";
 
 const MODES = {
   NEW: 0,
@@ -64,6 +65,7 @@ class Alert extends React.Component {
       this.setState({
         alert: {
           options: {
+            selector: "first",
             op: ">",
             value: 1,
             muted: false,
@@ -75,7 +77,7 @@ class Alert extends React.Component {
     } else {
       const { alertId } = this.props;
       AlertService.get({ id: alertId })
-        .then(alert => {
+        .then((alert) => {
           if (this._isMounted) {
             const canEdit = currentUser.canEdit(alert);
 
@@ -93,7 +95,7 @@ class Alert extends React.Component {
             this.onQuerySelected(alert.query);
           }
         })
-        .catch(error => {
+        .catch((error) => {
           if (this._isMounted) {
             this.props.onError(error);
           }
@@ -112,7 +114,7 @@ class Alert extends React.Component {
     alert.rearm = pendingRearm || null;
 
     return AlertService.save(alert)
-      .then(alert => {
+      .then((alert) => {
         notification.success("Saved.");
         navigateTo(`alerts/${alert.id}`, true);
         this.setState({ alert, mode: MODES.VIEW });
@@ -122,7 +124,7 @@ class Alert extends React.Component {
       });
   };
 
-  onQuerySelected = query => {
+  onQuerySelected = (query) => {
     this.setState(({ alert }) => ({
       alert: Object.assign(alert, { query }),
       queryResult: null,
@@ -130,7 +132,7 @@ class Alert extends React.Component {
 
     if (query) {
       // get cached result for column names and values
-      new QueryService(query).getQueryResultPromise().then(queryResult => {
+      new QueryService(query).getQueryResultPromise().then((queryResult) => {
         if (this._isMounted) {
           this.setState({ queryResult });
           let { column } = this.state.alert.options;
@@ -146,18 +148,18 @@ class Alert extends React.Component {
     }
   };
 
-  onNameChange = name => {
+  onNameChange = (name) => {
     const { alert } = this.state;
     this.setState({
       alert: Object.assign(alert, { name }),
     });
   };
 
-  onRearmChange = pendingRearm => {
+  onRearmChange = (pendingRearm) => {
     this.setState({ pendingRearm });
   };
 
-  setAlertOptions = obj => {
+  setAlertOptions = (obj) => {
     const { alert } = this.state;
     const options = { ...alert.options, ...obj };
     this.setState({
@@ -177,6 +179,17 @@ class Alert extends React.Component {
       });
   };
 
+  evaluate = () => {
+    const { alert } = this.state;
+    return AlertService.evaluate(alert)
+      .then(() => {
+        notification.success("Alert evaluated. Refresh page for updated status.");
+      })
+      .catch(() => {
+        notifications.error("Failed to evaluate alert.");
+      });
+  };
+
   mute = () => {
     const { alert } = this.state;
     return AlertService.mute(alert)
@@ -223,7 +236,14 @@ class Alert extends React.Component {
     const { queryResult, mode, canEdit, pendingRearm } = this.state;
 
     const menuButton = (
-      <MenuButton doDelete={this.delete} muted={muted} mute={this.mute} unmute={this.unmute} canEdit={canEdit} />
+      <MenuButton
+        doDelete={this.delete}
+        muted={muted}
+        mute={this.mute}
+        unmute={this.unmute}
+        canEdit={canEdit}
+        evaluate={this.evaluate}
+      />
     );
 
     const commonProps = {
@@ -258,7 +278,7 @@ routes.register(
   routeWithUserSession({
     path: "/alerts/new",
     title: "New Alert",
-    render: pageProps => <Alert {...pageProps} mode={MODES.NEW} />,
+    render: (pageProps) => <Alert {...pageProps} mode={MODES.NEW} />,
   })
 );
 routes.register(
@@ -266,7 +286,7 @@ routes.register(
   routeWithUserSession({
     path: "/alerts/:alertId",
     title: "Alert",
-    render: pageProps => <Alert {...pageProps} mode={MODES.VIEW} />,
+    render: (pageProps) => <Alert {...pageProps} mode={MODES.VIEW} />,
   })
 );
 routes.register(
@@ -274,6 +294,6 @@ routes.register(
   routeWithUserSession({
     path: "/alerts/:alertId/edit",
     title: "Alert",
-    render: pageProps => <Alert {...pageProps} mode={MODES.EDIT} />,
+    render: (pageProps) => <Alert {...pageProps} mode={MODES.EDIT} />,
   })
 );
diff --git a/client/app/pages/alert/components/Criteria.jsx b/client/app/pages/alert/components/Criteria.jsx
index 672aa86814..644e5d87e6 100644
--- a/client/app/pages/alert/components/Criteria.jsx
+++ b/client/app/pages/alert/components/Criteria.jsx
@@ -54,23 +54,70 @@ export default function Criteria({ columnNames, resultValues, alertOptions, onCh
     return null;
   })();
 
-  const columnHint = (
-    <small className="alert-criteria-hint">
-      Top row value is <code className="p-0">{toString(columnValue) || "unknown"}</code>
-    </small>
-  );
+  let columnHint;
+
+  if (alertOptions.selector === "first") {
+    columnHint = (
+      <small className="alert-criteria-hint">
+        Top row value is <code className="p-0">{toString(columnValue) || "unknown"}</code>
+      </small>
+    );
+  } else if (alertOptions.selector === "max") {
+    columnHint = (
+      <small className="alert-criteria-hint">
+        Max column value is{" "}
+        <code className="p-0">
+          {toString(Math.max(...resultValues.map((o) => o[alertOptions.column]))) || "unknown"}
+        </code>
+      </small>
+    );
+  } else if (alertOptions.selector === "min") {
+    columnHint = (
+      <small className="alert-criteria-hint">
+        Min column value is{" "}
+        <code className="p-0">
+          {toString(Math.min(...resultValues.map((o) => o[alertOptions.column]))) || "unknown"}
+        </code>
+      </small>
+    );
+  }
 
   return (
     <div data-test="Criteria">
+      <div className="input-title">
+        <span className="input-label">Selector</span>
+        {editMode ? (
+          <Select
+            value={alertOptions.selector}
+            onChange={(selector) => onChange({ selector })}
+            optionLabelProp="label"
+            dropdownMatchSelectWidth={false}
+            style={{ width: 80 }}
+          >
+            <Select.Option value="first" label="first">
+              first
+            </Select.Option>
+            <Select.Option value="min" label="min">
+              min
+            </Select.Option>
+            <Select.Option value="max" label="max">
+              max
+            </Select.Option>
+          </Select>
+        ) : (
+          <DisabledInput minWidth={60}>{alertOptions.selector}</DisabledInput>
+        )}
+      </div>
       <div className="input-title">
         <span className="input-label">Value column</span>
         {editMode ? (
           <Select
             value={alertOptions.column}
-            onChange={column => onChange({ column })}
+            onChange={(column) => onChange({ column })}
             dropdownMatchSelectWidth={false}
-            style={{ minWidth: 100 }}>
-            {columnNames.map(name => (
+            style={{ minWidth: 100 }}
+          >
+            {columnNames.map((name) => (
               <Select.Option key={name}>{name}</Select.Option>
             ))}
           </Select>
@@ -83,10 +130,11 @@ export default function Criteria({ columnNames, resultValues, alertOptions, onCh
         {editMode ? (
           <Select
             value={alertOptions.op}
-            onChange={op => onChange({ op })}
+            onChange={(op) => onChange({ op })}
             optionLabelProp="label"
             dropdownMatchSelectWidth={false}
-            style={{ width: 55 }}>
+            style={{ width: 55 }}
+          >
             <Select.Option value=">" label={CONDITIONS[">"]}>
               {CONDITIONS[">"]} greater than
             </Select.Option>
@@ -125,7 +173,7 @@ export default function Criteria({ columnNames, resultValues, alertOptions, onCh
             id="threshold-criterion"
             style={{ width: 90 }}
             value={alertOptions.value}
-            onChange={e => onChange({ value: e.target.value })}
+            onChange={(e) => onChange({ value: e.target.value })}
           />
         ) : (
           <DisabledInput minWidth={50}>{alertOptions.value}</DisabledInput>
diff --git a/client/app/pages/alert/components/MenuButton.jsx b/client/app/pages/alert/components/MenuButton.jsx
index ce1a0b839f..1aeb64bda5 100644
--- a/client/app/pages/alert/components/MenuButton.jsx
+++ b/client/app/pages/alert/components/MenuButton.jsx
@@ -11,7 +11,7 @@ import LoadingOutlinedIcon from "@ant-design/icons/LoadingOutlined";
 import EllipsisOutlinedIcon from "@ant-design/icons/EllipsisOutlined";
 import PlainButton from "@/components/PlainButton";
 
-export default function MenuButton({ doDelete, canEdit, mute, unmute, muted }) {
+export default function MenuButton({ doDelete, canEdit, mute, unmute, evaluate, muted }) {
   const [loading, setLoading] = useState(false);
 
   const execute = useCallback(action => {
@@ -55,6 +55,9 @@ export default function MenuButton({ doDelete, canEdit, mute, unmute, muted }) {
           <Menu.Item>
             <PlainButton onClick={confirmDelete}>Delete</PlainButton>
           </Menu.Item>
+          <Menu.Item>
+            <PlainButton onClick={() => execute(evaluate)}>Evaluate</PlainButton>
+          </Menu.Item>
         </Menu>
       }>
       <Button aria-label="More actions">
@@ -69,6 +72,7 @@ MenuButton.propTypes = {
   canEdit: PropTypes.bool.isRequired,
   mute: PropTypes.func.isRequired,
   unmute: PropTypes.func.isRequired,
+  evaluate: PropTypes.func.isRequired,
   muted: PropTypes.bool,
 };
 
diff --git a/client/app/services/alert.js b/client/app/services/alert.js
index 2171c27c6a..704d725ce6 100644
--- a/client/app/services/alert.js
+++ b/client/app/services/alert.js
@@ -36,6 +36,7 @@ const Alert = {
   delete: data => axios.delete(`api/alerts/${data.id}`),
   mute: data => axios.post(`api/alerts/${data.id}/mute`),
   unmute: data => axios.delete(`api/alerts/${data.id}/mute`),
+  evaluate: data => axios.post(`api/alerts/${data.id}/eval`),
 };
 
 export default Alert;
diff --git a/client/cypress/support/redash-api/index.js b/client/cypress/support/redash-api/index.js
index e9bc0ace69..2204f381c2 100644
--- a/client/cypress/support/redash-api/index.js
+++ b/client/cypress/support/redash-api/index.js
@@ -2,12 +2,12 @@
 
 const { extend, get, merge, find } = Cypress._;
 
-const post = options =>
+const post = (options) =>
   cy
     .getCookie("csrf_token")
-    .then(csrf => cy.request({ ...options, method: "POST", headers: { "X-CSRF-TOKEN": csrf.value } }));
+    .then((csrf) => cy.request({ ...options, method: "POST", headers: { "X-CSRF-TOKEN": csrf.value } }));
 
-Cypress.Commands.add("createDashboard", name => {
+Cypress.Commands.add("createDashboard", (name) => {
   return post({ url: "api/dashboards", body: { name } }).then(({ body }) => body);
 });
 
@@ -28,7 +28,7 @@ Cypress.Commands.add("createQuery", (data, shouldPublish = true) => {
   // eslint-disable-next-line cypress/no-assigning-return-values
   let request = post({ url: "/api/queries", body: merged }).then(({ body }) => body);
   if (shouldPublish) {
-    request = request.then(query =>
+    request = request.then((query) =>
       post({ url: `/api/queries/${query.id}`, body: { is_draft: false } }).then(() => query)
     );
   }
@@ -86,6 +86,7 @@ Cypress.Commands.add("addWidget", (dashboardId, visualizationId, options = {}) =
 Cypress.Commands.add("createAlert", (queryId, options = {}, name) => {
   const defaultOptions = {
     column: "?column?",
+    selector: "first",
     op: "greater than",
     rearm: 0,
     value: 1,
@@ -109,7 +110,7 @@ Cypress.Commands.add("createUser", ({ name, email, password }) => {
     url: "api/users?no_invite=yes",
     body: { name, email },
     failOnStatusCode: false,
-  }).then(xhr => {
+  }).then((xhr) => {
     const { status, body } = xhr;
     if (status < 200 || status > 400) {
       throw new Error(xhr);
@@ -146,7 +147,7 @@ Cypress.Commands.add("getDestinations", () => {
 Cypress.Commands.add("addDestinationSubscription", (alertId, destinationName) => {
   return cy
     .getDestinations()
-    .then(destinations => {
+    .then((destinations) => {
       const destination = find(destinations, { name: destinationName });
       if (!destination) {
         throw new Error("Destination not found");
@@ -166,6 +167,6 @@ Cypress.Commands.add("addDestinationSubscription", (alertId, destinationName) =>
     });
 });
 
-Cypress.Commands.add("updateOrgSettings", settings => {
+Cypress.Commands.add("updateOrgSettings", (settings) => {
   return post({ url: "api/settings/organization", body: settings }).then(({ body }) => body);
 });
diff --git a/package.json b/package.json
index 06422d1d68..b5d5e9443c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "redash-client",
-  "version": "24.07.0-dev",
+  "version": "24.08.0-dev",
   "description": "The frontend part of Redash.",
   "main": "index.js",
   "scripts": {
diff --git a/pyproject.toml b/pyproject.toml
index 74d1ad7435..97df8d94b4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,7 @@ force-exclude = '''
 
 [tool.poetry]
 name = "redash"
-version = "24.07.0-dev"
+version = "24.08.0-dev"
 description = "Make Your Company Data Driven. Connect to any data source, easily visualize, dashboard and share your data."
 authors = ["Arik Fraimovich <arik@redash.io>"]
 # to be added to/removed from the mailing list, please reach out to Arik via the above email or Discord
diff --git a/redash/__init__.py b/redash/__init__.py
index 16ebb66f91..58027b050e 100644
--- a/redash/__init__.py
+++ b/redash/__init__.py
@@ -14,7 +14,7 @@
 from redash.destinations import import_destinations
 from redash.query_runner import import_query_runners
 
-__version__ = "24.07.0-dev"
+__version__ = "24.08.0-dev"
 
 
 if os.environ.get("REMOTE_DEBUG"):
diff --git a/redash/handlers/alerts.py b/redash/handlers/alerts.py
index 9a59cd3cc0..5e107ebb41 100644
--- a/redash/handlers/alerts.py
+++ b/redash/handlers/alerts.py
@@ -1,7 +1,7 @@
 from flask import request
 from funcy import project
 
-from redash import models
+from redash import models, utils
 from redash.handlers.base import (
     BaseResource,
     get_object_or_404,
@@ -14,6 +14,10 @@
     view_only,
 )
 from redash.serializers import serialize_alert
+from redash.tasks.alerts import (
+    notify_subscriptions,
+    should_notify,
+)
 
 
 class AlertResource(BaseResource):
@@ -43,6 +47,21 @@ def delete(self, alert_id):
         models.db.session.commit()
 
 
+class AlertEvaluateResource(BaseResource):
+    def post(self, alert_id):
+        alert = get_object_or_404(models.Alert.get_by_id_and_org, alert_id, self.current_org)
+        require_admin_or_owner(alert.user.id)
+
+        new_state = alert.evaluate()
+        if should_notify(alert, new_state):
+            alert.state = new_state
+            alert.last_triggered_at = utils.utcnow()
+            models.db.session.commit()
+
+        notify_subscriptions(alert, new_state, {})
+        self.record_event({"action": "evaluate", "object_id": alert.id, "object_type": "alert"})
+
+
 class AlertMuteResource(BaseResource):
     def post(self, alert_id):
         alert = get_object_or_404(models.Alert.get_by_id_and_org, alert_id, self.current_org)
diff --git a/redash/handlers/api.py b/redash/handlers/api.py
index 48428daf0f..643bee371f 100644
--- a/redash/handlers/api.py
+++ b/redash/handlers/api.py
@@ -3,6 +3,7 @@
 from werkzeug.wrappers import Response
 
 from redash.handlers.alerts import (
+    AlertEvaluateResource,
     AlertListResource,
     AlertMuteResource,
     AlertResource,
@@ -117,6 +118,7 @@ def json_representation(data, code, headers=None):
 
 api.add_org_resource(AlertResource, "/api/alerts/<alert_id>", endpoint="alert")
 api.add_org_resource(AlertMuteResource, "/api/alerts/<alert_id>/mute", endpoint="alert_mute")
+api.add_org_resource(AlertEvaluateResource, "/api/alerts/<alert_id>/eval", endpoint="alert_eval")
 api.add_org_resource(
     AlertSubscriptionListResource,
     "/api/alerts/<alert_id>/subscriptions",
diff --git a/redash/models/__init__.py b/redash/models/__init__.py
index 91ddd91ee3..fc9c3f49b4 100644
--- a/redash/models/__init__.py
+++ b/redash/models/__init__.py
@@ -926,6 +926,7 @@ class Alert(TimestampMixin, BelongsToOrgMixin, db.Model):
     UNKNOWN_STATE = "unknown"
     OK_STATE = "ok"
     TRIGGERED_STATE = "triggered"
+    TEST_STATE = "test"
 
     id = primary_key("Alert")
     name = Column(db.String(255))
@@ -960,7 +961,24 @@ def evaluate(self):
         if data["rows"] and self.options["column"] in data["rows"][0]:
             op = OPERATORS.get(self.options["op"], lambda v, t: False)
 
-            value = data["rows"][0][self.options["column"]]
+            if "selector" not in self.options:
+                selector = "first"
+            else:
+                selector = self.options["selector"]
+
+            if selector == "max":
+                max_val = float("-inf")
+                for i in range(0, len(data["rows"])):
+                    max_val = max(max_val, data["rows"][i][self.options["column"]])
+                value = max_val
+            elif selector == "min":
+                min_val = float("inf")
+                for i in range(0, len(data["rows"])):
+                    min_val = min(min_val, data["rows"][i][self.options["column"]])
+                value = min_val
+            else:
+                value = data["rows"][0][self.options["column"]]
+
             threshold = self.options["value"]
 
             new_state = next_state(op, value, threshold)
@@ -988,11 +1006,12 @@ def render_template(self, template):
         result_table = []  # A two-dimensional array which can rendered as a table in Mustache
         for row in data["rows"]:
             result_table.append([row[col["name"]] for col in data["columns"]])
-
+        print("OPTIONS", self.options)
         context = {
             "ALERT_NAME": self.name,
             "ALERT_URL": "{host}/alerts/{alert_id}".format(host=host, alert_id=self.id),
             "ALERT_STATUS": self.state.upper(),
+            "ALERT_SELECTOR": self.options["selector"],
             "ALERT_CONDITION": self.options["op"],
             "ALERT_THRESHOLD": self.options["value"],
             "QUERY_NAME": self.query_rel.name,
diff --git a/redash/tasks/queries/execution.py b/redash/tasks/queries/execution.py
index cba2aded07..a863903cdb 100644
--- a/redash/tasks/queries/execution.py
+++ b/redash/tasks/queries/execution.py
@@ -1,5 +1,7 @@
 import signal
+import sys
 import time
+from collections import deque
 
 import redis
 from rq import get_current_job
@@ -145,6 +147,30 @@ def _resolve_user(user_id, is_api_key, query_id):
         return None
 
 
+def _get_size_iterative(dict_obj):
+    """Iteratively finds size of objects in bytes"""
+    seen = set()
+    size = 0
+    objects = deque([dict_obj])
+
+    while objects:
+        current = objects.popleft()
+        if id(current) in seen:
+            continue
+        seen.add(id(current))
+        size += sys.getsizeof(current)
+
+        if isinstance(current, dict):
+            objects.extend(current.keys())
+            objects.extend(current.values())
+        elif hasattr(current, "__dict__"):
+            objects.append(current.__dict__)
+        elif hasattr(current, "__iter__") and not isinstance(current, (str, bytes, bytearray)):
+            objects.extend(current)
+
+    return size
+
+
 class QueryExecutor:
     def __init__(self, query, data_source_id, user_id, is_api_key, metadata, is_scheduled_query):
         self.job = get_current_job()
@@ -195,7 +221,7 @@ def run(self):
             "job=execute_query query_hash=%s ds_id=%d data_length=%s error=[%s]",
             self.query_hash,
             self.data_source_id,
-            data and len(data),
+            data and _get_size_iterative(data),
             error,
         )
 
diff --git a/tests/handlers/test_alerts.py b/tests/handlers/test_alerts.py
index 6bafcf34c0..775a156395 100644
--- a/tests/handlers/test_alerts.py
+++ b/tests/handlers/test_alerts.py
@@ -1,4 +1,9 @@
+import datetime
+
+from mock import patch
+
 from redash.models import Alert, AlertSubscription, db
+from redash.utils import utcnow
 from tests import BaseTestCase
 
 
@@ -39,6 +44,26 @@ def test_updates_alert(self):
         self.assertEqual(rv.status_code, 200)
 
 
+class TestAlertEvaluateResource(BaseTestCase):
+    @patch("redash.handlers.alerts.notify_subscriptions")
+    def test_evaluates_alert_and_notifies(self, mock_notify_subscriptions):
+        query = self.factory.create_query(
+            data_source=self.factory.create_data_source(group=self.factory.create_group())
+        )
+        retrieved_at = utcnow() - datetime.timedelta(days=1)
+        query_result = self.factory.create_query_result(
+            retrieved_at=retrieved_at,
+            query_text=query.query_text,
+            query_hash=query.query_hash,
+        )
+        query.latest_query_data = query_result
+        alert = self.factory.create_alert(query_rel=query)
+        rv = self.make_request("post", "/api/alerts/{}/eval".format(alert.id))
+
+        self.assertEqual(rv.status_code, 200)
+        mock_notify_subscriptions.assert_called()
+
+
 class TestAlertResourceDelete(BaseTestCase):
     def test_removes_alert_and_subscriptions(self):
         subscription = self.factory.create_alert_subscription()
diff --git a/tests/models/test_alerts.py b/tests/models/test_alerts.py
index e40a8b2e56..ca0aa2ce86 100644
--- a/tests/models/test_alerts.py
+++ b/tests/models/test_alerts.py
@@ -49,7 +49,9 @@ class TestAlertEvaluate(BaseTestCase):
     def create_alert(self, results, column="foo", value="1"):
         result = self.factory.create_query_result(data=results)
         query = self.factory.create_query(latest_query_data_id=result.id)
-        alert = self.factory.create_alert(query_rel=query, options={"op": "equals", "column": column, "value": value})
+        alert = self.factory.create_alert(
+            query_rel=query, options={"selector": "first", "op": "equals", "column": column, "value": value}
+        )
         return alert
 
     def test_evaluate_triggers_alert_when_equal(self):
@@ -69,6 +71,24 @@ def test_evaluate_return_unknown_when_empty_results(self):
         alert = self.create_alert(results)
         self.assertEqual(alert.evaluate(), Alert.UNKNOWN_STATE)
 
+    def test_evaluates_correctly_with_max_selector(self):
+        results = {"rows": [{"foo": 1}, {"foo": 2}], "columns": [{"name": "foo", "type": "STRING"}]}
+        alert = self.create_alert(results)
+        alert.options["selector"] = "max"
+        self.assertEqual(alert.evaluate(), Alert.OK_STATE)
+
+    def test_evaluates_correctly_with_min_selector(self):
+        results = {"rows": [{"foo": 2}, {"foo": 1}], "columns": [{"name": "foo", "type": "STRING"}]}
+        alert = self.create_alert(results)
+        alert.options["selector"] = "min"
+        self.assertEqual(alert.evaluate(), Alert.TRIGGERED_STATE)
+
+    def test_evaluates_correctly_with_first_selector(self):
+        results = {"rows": [{"foo": 1}, {"foo": 2}], "columns": [{"name": "foo", "type": "STRING"}]}
+        alert = self.create_alert(results)
+        alert.options["selector"] = "first"
+        self.assertEqual(alert.evaluate(), Alert.TRIGGERED_STATE)
+
 
 class TestNextState(TestCase):
     def test_numeric_value(self):
@@ -94,7 +114,9 @@ class TestAlertRenderTemplate(BaseTestCase):
     def create_alert(self, results, column="foo", value="5"):
         result = self.factory.create_query_result(data=results)
         query = self.factory.create_query(latest_query_data_id=result.id)
-        alert = self.factory.create_alert(query_rel=query, options={"op": "equals", "column": column, "value": value})
+        alert = self.factory.create_alert(
+            query_rel=query, options={"selector": "first", "op": "equals", "column": column, "value": value}
+        )
         return alert
 
     def test_render_custom_alert_template(self):
@@ -102,6 +124,7 @@ def test_render_custom_alert_template(self):
         custom_alert = """
         <pre>
         ALERT_STATUS        {{ALERT_STATUS}}
+        ALERT_SELECTOR      {{ALERT_SELECTOR}}
         ALERT_CONDITION     {{ALERT_CONDITION}}
         ALERT_THRESHOLD     {{ALERT_THRESHOLD}}
         ALERT_NAME          {{ALERT_NAME}}
@@ -116,6 +139,7 @@ def test_render_custom_alert_template(self):
         expected = """
         <pre>
         ALERT_STATUS        UNKNOWN
+        ALERT_SELECTOR      first
         ALERT_CONDITION     equals
         ALERT_THRESHOLD     5
         ALERT_NAME          %s