Instance Settings

Per-instance configuration for the search engine. Each field is documented with default, range where applicable, and behavior.

For the Search Order explanation (Random vs Chronological) see Search Order. For tuning guidance see Increase Throughput. For the per-app API command Houndarr sends see Search Commands.

:::tip Want to start fresh? If you want every instance back to default policy without losing the instances themselves, use Settings > Admin > Maintenance > Reset all instance settings. It reverts every field below at once but keeps your connection details and API keys. See Admin actions for the full list of what a reset touches. :::

The same form opens when you click Edit on an existing row, with the current values pre-populated. The API key stays masked until you overwrite it.

Missing search controls

Batch Size

Maximum number of missing items considered per cycle.

• Default: 2
• Lower values are safer; higher values clear backlog faster.

Sleep (minutes)

Wait time between cycles for each enabled instance.

• Default: 30
• Lower values increase request frequency.

Hourly Cap

Maximum successful missing searches per hour.

• Default: 4
• Set 0 to disable this cap (not recommended unless you trust upstream limits).

Cooldown (days)

Minimum days before retrying the same missing item.

• Default: 14
• Larger values reduce repeat search noise.
• Release-aware retry applies to the missing pass only. See Skip Reasons.

Post-Release Grace (hours)

Hours to wait after an item's release date before searching.

• Default: 6
• Items inside this window log as post-release grace (Nh) and skip.
• Items not yet released (no date, or a future date) log as not yet released regardless of this setting.

Release date evaluation varies by app type:

App	Date priority chain
Radarr	digitalRelease -> physicalRelease -> releaseDate -> inCinemas. Unavailable or pre-release titles may be skipped via isAvailable / status.
Sonarr, Whisparr v2	airDateUtc (Sonarr) or releaseDate (Whisparr v2)
Whisparr v3	Same chain as Radarr: digitalRelease -> physicalRelease -> inCinemas
Lidarr	Album releaseDate
Readarr	Book releaseDate

Sonarr Missing Search Mode

Strategy for Sonarr missing-pass commands.

• Default: Episode search (default)
• Advanced: Season-context search (advanced)

Season-context mode sends at most one SeasonSearch per (series, season) per pass. Cooldown in season-context mode is tracked at the season level via a stable synthetic ID derived from the series ID and season number, not through any individual episode. Cooldown history stays consistent across cycles regardless of which episode appears first on the wanted list.

Lidarr Missing Search Mode

• Default: Album search (default)
• Advanced: Artist-context search (advanced)

Artist-context mode sends at most one ArtistSearch per artist per pass.

Readarr Missing Search Mode

• Default: Book search (default)
• Advanced: Author-context search (advanced)

Author-context mode sends at most one AuthorSearch per author per pass.

Whisparr v2 Missing Search Mode

• Default: Episode search (default)
• Advanced: Season-context search (advanced)

Whisparr v3 has no search mode selection; it always searches at the movie level.

Search Order

See Search Order for the full explanation.

• Default: Random (fresh installs only; existing instances keep their pre-upgrade setting, typically Chronological)
• Alternative: Chronological

Cutoff upgrade controls

Cutoff search

Enable searching for items that do not meet your quality cutoff.

• Default: Off

Cutoff Batch

Maximum cutoff items considered per cutoff cycle.

• Default: 1

Cutoff Cooldown

Minimum days before retrying the same cutoff item.

• Default: 21

Cutoff Cap

Maximum successful cutoff searches per hour.

• Default: 1
• Set 0 to disable the cutoff hourly cap.

Cutoff searches use separate cap and cooldown from missing searches, so the two passes do not draw from the same budget. The missing-pass release-aware retry does not apply to cutoff searches.

Library upgrade controls

Upgrade search

Re-search items that already have files and meet your quality cutoff. Lets your *arr instance find better releases based on quality profiles and custom format scoring.

• Default: Off
• Unlike cutoff search (which targets items below cutoff), upgrade search targets items that already meet cutoff.

Upgrade Batch

• Default: 1
• Hard cap: 5. Engine-enforced; configured values above 5 are clamped to 5.

Upgrade Cooldown (days)

• Default: 90
• Minimum: 7. Engine-enforced; configured values below 7 are clamped to 7.

Upgrade Cap

• Default: 1
• Hard cap: 5. Engine-enforced.
• Set 0 to disable the upgrade hourly cap.

Upgrade Search Mode

Per-app strategy for upgrade-pass commands. Independent of the missing search mode.

• Sonarr, Whisparr v2: Episode (default) or Season-context
• Lidarr: Album (default) or Artist-context
• Readarr: Book (default) or Author-context
• Radarr, Whisparr v3: Always movie-level (no mode selection)

Upgrade Series Window (Sonarr / Whisparr v2 only)

How many monitored series the upgrade pass samples per cycle. The series offset rotates by this amount each cycle, so the whole library cycles through over time.

• Default: 5
• Range: 1 to 100
• Larger windows finish a full library rotation faster but make every upgrade cycle hit more series at once. Raise this on a large Sonarr library if you can absorb the higher per-cycle load on the *arr instance.
• No effect on Radarr, Whisparr v3, Lidarr, or Readarr.

Offset-based rotation

Applies when Search Order is Chronological. Persistent per-pass offsets (missing_page_offset, cutoff_page_offset, and upgrade offsets) advance through the wanted list across cycles so items further down do not starve. Offsets reset to page 1 when you save instance settings. Upgrade offsets reset to zero when upgrade search is toggled off.

Under Search Order: Random, the offset columns are still written but not used for rotation; the engine picks a fresh random page each cycle.

Queue backpressure

• Default: 0 (disabled)
• When set above zero, the cycle is skipped with reason queue backpressure (N/M) if the download queue count is at or above the limit.
• Fail-open: unreachable queue endpoint lets the cycle proceed.
• See Skip Reasons: queue backpressure.

Allowed search window

Restricts scheduled cycles to one or more time-of-day windows.

• Default: empty (24/7)
• Format: HH:MM-HH:MM per window, comma-separated for multiple. Examples: 09:00-23:00, 09:00-12:00,18:00-22:00, 22:00-06:00 (wrap-around).
• Timezone: windows interpreted in the container's local time (TZ env var; falls back to UTC).
• Boundary: start inclusive, end exclusive. 09:00-12:00 allows 09:00:00 but blocks 12:00:00.
• DST caveat: avoid windows overlapping the spring-forward gap (02:00-03:00 does not exist that day) or the fall-back repeat (01:00-02:00 occurs twice).
• Manual Run Now always runs, even outside the window. The gate applies to scheduled cycles only.
• When the gate fires, the cycle logs one outside allowed time window info row and sleeps normally. See Skip Reasons: outside allowed time window.

Recommended starting profile

Setting	Value
Batch Size	2
Sleep (minutes)	30
Hourly Cap	4
Cooldown (days)	14
Post-Release Grace (hrs)	6
Queue Limit	0 (disabled)
Allowed Search Window	(blank, 24/7)
Search Order	Random
Cutoff search	Off
Cutoff Batch	1
Cutoff Cooldown	21
Cutoff Cap	1
Upgrade search	Off
Upgrade Batch	1 (hard cap: 5)
Upgrade Cooldown	90 (min: 7)
Upgrade Series Window	5 (range 1-100, Sonarr/Whisparr v2 only)
Upgrade Cap	1 (hard cap: 5)

Status control

Instance enabled / disabled state is controlled from the row toggle in Settings. New instances are created as enabled by default.

Same list on a phone-width viewport; each row keeps its own Disable / Edit / Delete controls.