diff --git a/cloud/bmaas/bmdb/model/queries_stats.sql b/cloud/bmaas/bmdb/model/queries_stats.sql
new file mode 100644
index 0000000..d868a6c
--- /dev/null
+++ b/cloud/bmaas/bmdb/model/queries_stats.sql
@@ -0,0 +1,110 @@
+-- name: CountActiveWork :many
+-- Return number of active work, grouped by process.
+SELECT COUNT(*), work.process
+FROM work
+GROUP BY (work.process);
+
+-- name: CountActiveBackoffs :many
+-- Return number of active backoffs, grouped by process.
+SELECT COUNT(*), work_backoff.process
+FROM work_backoff
+GROUP BY (work_backoff.process);
+
+-- name: CountMachines :one
+SELECT COUNT(*)
+FROM machines;
+
+-- name: CountMachinesProvided :one
+SELECT COUNT(*)
+FROM machine_provided;
+
+-- name: CountMachinesAgentHeartbeating :one
+SELECT COUNT(*)
+FROM machines
+    INNER JOIN machine_provided ON machines.machine_id = machine_provided.machine_id
+    INNER JOIN machine_agent_heartbeat ON machines.machine_id = machine_agent_heartbeat.machine_id
+WHERE
+    now() < machine_agent_heartbeat.agent_heartbeat_at + interval '10 minute';
+
+-- name: CountMachinesInstallationPending :one
+SELECT COUNT(*)
+FROM machines
+    INNER JOIN machine_provided ON machines.machine_id = machine_provided.machine_id
+    INNER JOIN machine_os_installation_request ON machines.machine_id = machine_os_installation_request.machine_id
+    LEFT JOIN machine_os_installation_report ON machines.machine_id = machine_os_installation_report.machine_id
+WHERE
+        machine_os_installation_request.generation IS DISTINCT FROM machine_os_installation_report.generation;
+
+-- name: CountMachinesInstallationComplete :one
+SELECT COUNT(*)
+FROM machines
+         INNER JOIN machine_provided ON machines.machine_id = machine_provided.machine_id
+         INNER JOIN machine_os_installation_request ON machines.machine_id = machine_os_installation_request.machine_id
+         INNER JOIN machine_os_installation_report ON machines.machine_id = machine_os_installation_report.machine_id
+WHERE
+    machine_os_installation_request.generation IS NOT DISTINCT FROM machine_os_installation_report.generation;
+
+-- name: CountMachinesForAgentStart :one
+-- Return number of machines eligible for agent start.
+-- ONCHANGE(queries_workflows.sql): constraints must be kept in sync with GetMachinesForAgentStart.
+SELECT COUNT(machine_provided)
+FROM machines
+         INNER JOIN machine_provided ON machines.machine_id = machine_provided.machine_id
+         LEFT JOIN work ON machines.machine_id = work.machine_id AND work.process IN ('ShepherdAccess', 'ShepherdAgentStart', 'ShepherdRecovery')
+         LEFT JOIN work_backoff ON machines.machine_id = work_backoff.machine_id AND work_backoff.until > now() AND work_backoff.process = 'ShepherdAgentStart'
+         LEFT JOIN machine_agent_started ON machines.machine_id = machine_agent_started.machine_id
+         LEFT JOIN machine_os_installation_request ON machines.machine_id = machine_os_installation_request.machine_id
+         LEFT JOIN machine_os_installation_report ON machines.machine_id = machine_os_installation_report.machine_id
+WHERE
+    work.machine_id IS NULL
+    AND work_backoff.machine_id IS NULL
+    AND machine_agent_started.machine_id IS NULL
+    -- If there is a pending installation request, it must not have been fulfilled already.
+    AND (
+        machine_os_installation_request.machine_id IS NULL
+        OR machine_os_installation_report.generation IS DISTINCT FROM machine_os_installation_request.generation
+    );
+
+-- name: CountMachinesForAgentRecovery :one
+-- Return number of machines eligible for agent recovery.
+-- ONCHANGE(queries_workflows.sql): constraints must be kept in sync with GetMachineForAgentRecovery.
+SELECT COUNT(machine_provided)
+FROM machines
+         INNER JOIN machine_provided ON machines.machine_id = machine_provided.machine_id
+         LEFT JOIN work ON machines.machine_id = work.machine_id AND work.process IN ('ShepherdAccess', 'ShepherdAgentStart', 'ShepherdRecovery')
+         LEFT JOIN work_backoff ON machines.machine_id = work_backoff.machine_id AND work_backoff.until > now() AND work_backoff.process = 'ShepherdRecovery'
+         INNER JOIN machine_agent_started ON machines.machine_id = machine_agent_started.machine_id
+         LEFT JOIN machine_agent_heartbeat ON machines.machine_id = machine_agent_heartbeat.machine_id
+         LEFT JOIN machine_os_installation_request ON machines.machine_id = machine_os_installation_request.machine_id
+         LEFT JOIN machine_os_installation_report ON machines.machine_id = machine_os_installation_report.machine_id
+WHERE
+    work.machine_id IS NULL
+    AND work_backoff.machine_id IS NULL
+    -- Only act on machines where the agent is expected to have been started:
+    -- 1. If there is a pending installation request, it must not have been fulfilled already.
+    AND (
+        machine_os_installation_request.machine_id IS NULL
+        OR machine_os_installation_report.generation IS DISTINCT FROM machine_os_installation_request.generation
+    )
+    -- 2. The agent must have never heartbeat or must have stopped heartbeating.
+    AND (
+        -- No heartbeat 30 minutes after starting the agent.
+        ( machine_agent_heartbeat.machine_id IS NULL
+          AND now() > (machine_agent_started.agent_started_at + interval '30 minutes')
+        )
+        -- Heartbeats ceased for 10 minutes.
+        OR ( machine_agent_heartbeat.machine_id IS NOT NULL
+          AND now() > (machine_agent_heartbeat.agent_heartbeat_at + interval '10 minutes')
+        )
+    );
+
+-- name: ListMachineHardware :many
+SELECT
+    machine_provided.*,
+    machine_hardware_report.*
+FROM machines
+         INNER JOIN machine_provided ON machines.machine_id = machine_provided.machine_id
+         INNER JOIN machine_hardware_report ON machines.machine_id = machine_hardware_report.machine_id
+WHERE machines.machine_id > $1
+ORDER BY machines.machine_id ASC
+LIMIT $2;