# Latest **URL:** https://community.questdb.com/latest.md [Latest](https://community.questdb.com/latest.md) · [Categories](https://community.questdb.com/categories.md) · [Tags](https://community.questdb.com/tags.md) --- ## [Welcome to the QuestDB community forum!](https://community.questdb.com/t/welcome-to-the-questdb-community-forum/824)
**Author:** [@goodroot](https://community.questdb.com/u/goodroot)\ **Replies:** 0\ **Last updated:** [April 30, 2025, 4:52pm UTC](https://community.questdb.com/t/welcome-to-the-questdb-community-forum/824 "2025-04-30T16:52:43Z")
Welcome to the QuestDB Community forum! Questions about QuestDB? Looking for tips and tricks? This is the right spot. The developers frequent this forum, and it’s important to us. Enjoy! – The QuestDB Team --- ## [QuestDB Enterprise 4.0: cold storage, QWP, and restart-free failover](https://community.questdb.com/t/questdb-enterprise-4-0-cold-storage-qwp-and-restart-free-failover/1010)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 0\ **Last updated:** [September 4, 2026, 8:23am UTC](https://community.questdb.com/t/questdb-enterprise-4-0-cold-storage-qwp-and-restart-free-failover/1010 "2026-09-04T08:23:22Z")
High-ingress architectures rarely stay simple for long. As data volumes or feed counts grow, new modules start accumulating around the database: a job moves old partitions into object storage when local disks fill up; a … --- ## [QuestDB 10.0 is out, and it is a big release](https://community.questdb.com/t/questdb-10-0-is-out-and-it-is-a-big-release/1007)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 4\ **Last updated:** [September 18, 2026, 10:48am UTC](https://community.questdb.com/t/questdb-10-0-is-out-and-it-is-a-big-release/1007 "2026-09-18T10:48:32Z")
Fast ingestion is what QuestDB is known for. Getting the data back out at the same speed was the harder problem, and for years the answer was the PostgreSQL wire protocol, which was never designed for it. QuestDB 10.0 c… --- ## [QuestDB 9.1.0 Release](https://community.questdb.com/t/questdb-9-1-0-release/925)
**Author:** [@Anna\_Semenova](https://community.questdb.com/u/Anna_Semenova)\ **Replies:** 0\ **Last updated:** [October 8, 2025, 9:12am UTC](https://community.questdb.com/t/questdb-9-1-0-release/925 "2025-10-08T09:12:21Z")
We’re thrilled to announce QuestDB 9.1.0 – a powerhouse release that takes time-series precision and performance to the next level! This release introduces nanosecond timestamp precision for ultra-high-resolution worklo… --- ## [Restore from partition folders](https://community.questdb.com/t/restore-from-partition-folders/1014)
**Author:** [@YBrink](https://community.questdb.com/u/YBrink)\ **Replies:** 2\ **Last updated:** [September 18, 2026, 1:23pm UTC](https://community.questdb.com/t/restore-from-partition-folders/1014 "2026-09-18T13:23:52Z")
Questdb crashed due to an error in the txn\_seq folder of one of our tables. Now on disk, I can see a bunch of partition folders in there; Is it possible to restore those without the txn\_seq folder? Something like: c… --- ## [Can you merge parquet partitions?](https://community.questdb.com/t/can-you-merge-parquet-partitions/1006)
**Author:** [@Holger\_Amort](https://community.questdb.com/u/Holger_Amort)\ **Replies:** 1\ **Last updated:** [July 30, 2026, 7:32pm UTC](https://community.questdb.com/t/can-you-merge-parquet-partitions/1006 "2026-07-30T19:32:58Z")
I know you can define tables as parquet format like PARTITION BY HOUR FORMAT PARQUET WAL; Can you then merge the parquet files and they would still work? Lets say from HOUR to DAY? --- ## [Sorting by timestamp ASC doesn't work on QDB 9.4.2](https://community.questdb.com/t/sorting-by-timestamp-asc-doesnt-work-on-qdb-9-4-2/1005)
**Author:** [@Gabriel](https://community.questdb.com/u/Gabriel)\ **Replies:** 1\ **Last updated:** [July 24, 2026, 9:08pm UTC](https://community.questdb.com/t/sorting-by-timestamp-asc-doesnt-work-on-qdb-9-4-2/1005 "2026-07-24T21:08:59Z")
Hello, On a specific request the ordering by timestamp ascending is not working while the descending ordering works on QDB 9.4.2. The initial request is: SELECT \* FROM ( SELECT a03.timestamp as timestamp, a03.n\_pap\_03… --- ## [QuestDB import with out of order data](https://community.questdb.com/t/questdb-import-with-out-of-order-data/1001)
**Author:** [@Sebastian\_Kiontke](https://community.questdb.com/u/Sebastian_Kiontke)\ **Replies:** 4\ **Last updated:** [July 3, 2026, 9:44am UTC](https://community.questdb.com/t/questdb-import-with-out-of-order-data/1001 "2026-07-03T09:44:09Z")
Hello, we have the requirement to import an amount of 4.800.000.000 rows as fast as possible into questdb. Source of the data are 50 million Kafka events. Each event has 96 15-minutes values of a energy meter (a whole d… --- ## [QuestDB 9.4.2 is out](https://community.questdb.com/t/questdb-9-4-2-is-out/1000)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 0\ **Last updated:** [June 12, 2026, 8:41am UTC](https://community.questdb.com/t/questdb-9-4-2-is-out/1000 "2026-06-12T08:41:13Z")
QuestDB 9.4.2 is a hardening release driven by continued fuzz testing and stricter query-result assertions. Under heavy ingestion, a few edge cases around Parquet tables and the new posting index could surface, sometimes… --- ## [QWP ready for production use?](https://community.questdb.com/t/qwp-ready-for-production-use/999)
**Author:** [@Vangreen](https://community.questdb.com/u/Vangreen)\ **Replies:** 2\ **Last updated:** [June 12, 2026, 8:35am UTC](https://community.questdb.com/t/qwp-ready-for-production-use/999 "2026-06-12T08:35:54Z")
Hi, I noticed mentions of QWP in the release notes for both the Java QuestDB client and the main repository. Is QWP already ready for production use? I also saw a LinkedIn post some time ago mentioning a pub/sub featur… --- ## [GZip support in ILP ingestion](https://community.questdb.com/t/gzip-support-in-ilp-ingestion/918)
**Author:** [@pdeng](https://community.questdb.com/u/pdeng)\ **Replies:** 5\ **Last updated:** [May 27, 2026, 9:25am UTC](https://community.questdb.com/t/gzip-support-in-ilp-ingestion/918 "2026-05-27T09:25:47Z")
Hi there, InfluxDB supports gzip message to optimise ILP ingestion. Can QuestDB support it? I cannot find anywhere to configure it, or do you have ETA for this feature? Cheers, Paul --- ## [QuestDB Recovery](https://community.questdb.com/t/questdb-recovery/997)
**Author:** [@azuric](https://community.questdb.com/u/azuric)\ **Replies:** 1\ **Last updated:** [May 26, 2026, 5:04pm UTC](https://community.questdb.com/t/questdb-recovery/997 "2026-05-26T17:04:55Z")
hey all, hoping someone can point me at a recovery path before i do something stupid. i had a bulk ingest go sideways and now both my big tables (\`quotes\` ~30B rows / 2 TB, \`trades\` ~1.5B / 95 GB) are suspended with: \`… --- ## [QuestDB 9.4.0: Posting index, cross-column fill, and smarter Web Console](https://community.questdb.com/t/questdb-9-4-0-posting-index-cross-column-fill-and-smarter-web-console/996)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 0\ **Last updated:** [May 21, 2026, 8:27am UTC](https://community.questdb.com/t/questdb-9-4-0-posting-index-cross-column-fill-and-smarter-web-console/996 "2026-05-21T08:27:40Z")
QuestDB 9.4.0 ships a new index type for SYMBOL columns that is 13x smaller than the bitmap index, a FILL(PREV(col)) syntax that carries values across columns in SAMPLE BY, and a smarter Web Console that generates materi… --- ## [Multithreaded ingestion and out of order](https://community.questdb.com/t/multithreaded-ingestion-and-out-of-order/986)
**Author:** [@Pablo](https://community.questdb.com/u/Pablo)\ **Replies:** 4\ **Last updated:** [May 21, 2026, 8:21am UTC](https://community.questdb.com/t/multithreaded-ingestion-and-out-of-order/986 "2026-05-21T08:21:41Z")
Hi everyone I’m trying to save some trades data into a daily partitionned QuestDB table. In order to do as keep time ordering, i sort my data and ingest day by day: Get all the day data needed Ingest it Wait for no W… --- ## [Corrupted table / Metadata read timeout - Cannot disable WAL](https://community.questdb.com/t/corrupted-table-metadata-read-timeout-cannot-disable-wal/992)
**Author:** [@programmerP](https://community.questdb.com/u/programmerP)\ **Replies:** 3\ **Last updated:** [May 15, 2026, 2:12pm UTC](https://community.questdb.com/t/corrupted-table-metadata-read-timeout-cannot-disable-wal/992 "2026-05-15T14:12:28Z")
Hi everyone, I am rather new to QuestDB and really want to use it. Unfortunately I am running into a problem with a corrupted data. When I query my table it returns an error: Metadata read timeout \[src=reader, timeout=… --- ## [Null for minTimestamp, maxTimestamp and rowCount](https://community.questdb.com/t/null-for-mintimestamp-maxtimestamp-and-rowcount/994)
**Author:** [@Mateusz\_Wolnica](https://community.questdb.com/u/Mateusz_Wolnica)\ **Replies:** 2\ **Last updated:** [May 15, 2026, 2:10pm UTC](https://community.questdb.com/t/null-for-mintimestamp-maxtimestamp-and-rowcount/994 "2026-05-15T14:10:48Z")
These columns should have values, why is it not working properly? --- ## [How to fix execution time discrepancy curl vs http?](https://community.questdb.com/t/how-to-fix-execution-time-discrepancy-curl-vs-http/989)
**Author:** [@YBrink](https://community.questdb.com/u/YBrink)\ **Replies:** 2\ **Last updated:** [May 12, 2026, 10:33am UTC](https://community.questdb.com/t/how-to-fix-execution-time-discrepancy-curl-vs-http/989 "2026-05-12T10:33:58Z")
I am attempting to run queries using a http client from within a .Net environment. The trouble I’m experiencing is noticeable delays in retrieving data; a delay that does not occur when using curl, or running the query … --- ## [QuestDB Select \* very slow](https://community.questdb.com/t/questdb-select-very-slow/929)
**Author:** [@falex](https://community.questdb.com/u/falex)\ **Replies:** 6\ **Last updated:** [April 28, 2026, 12:19pm UTC](https://community.questdb.com/t/questdb-select-very-slow/929 "2026-04-28T12:19:27Z")
Hi Team, I’m a bit confused with the performance of QuestDB. I’m running a QuestDB 8.3.3 into a podman container on my MacBookPro M4. The database is store into my laptop hardrive. I’ve created a table to record transa… --- ## [Scaling questdb](https://community.questdb.com/t/scaling-questdb/943)
**Author:** [@Glenn\_Glazer](https://community.questdb.com/u/Glenn_Glazer)\ **Replies:** 4\ **Last updated:** [April 28, 2026, 12:18pm UTC](https://community.questdb.com/t/scaling-questdb/943 "2026-04-28T12:18:49Z")
We are looking at using QDB as a part of a replacement of a part of our pipeline that uses Kafka for both streaming and storage, decoupling the storage part and using QDB for that. What we are interested in at the momen… --- ## [is it possible to show a quick demo on cache the sender objects with python package](https://community.questdb.com/t/is-it-possible-to-show-a-quick-demo-on-cache-the-sender-objects-with-python-package/984)
**Author:** [@Ron321456](https://community.questdb.com/u/Ron321456)\ **Replies:** 1\ **Last updated:** [April 28, 2026, 12:16pm UTC](https://community.questdb.com/t/is-it-possible-to-show-a-quick-demo-on-cache-the-sender-objects-with-python-package/984 "2026-04-28T12:16:48Z")
according to the documentation here: Sending Data over ILP — questdb 3.0.0 documentation “For maxium performance you should also cache the sender objects and reuse them across multiple requests, since internally they ma… --- ## [Poor table to table insert performance, but extremely fast read perf](https://community.questdb.com/t/poor-table-to-table-insert-performance-but-extremely-fast-read-perf/983)
**Author:** [@Nom](https://community.questdb.com/u/Nom)\ **Replies:** 1\ **Last updated:** [April 28, 2026, 12:15pm UTC](https://community.questdb.com/t/poor-table-to-table-insert-performance-but-extremely-fast-read-perf/983 "2026-04-28T12:15:40Z")
Due to the sensitive nature of my workplace, I am using a minimum example which displays the performance issue. The selection speed is phenomenal, but writing seems off. Specs: Storage: 240GB Sata SSD 300MB/s tested … --- ## [Console is freezing in 9.3.5](https://community.questdb.com/t/console-is-freezing-in-9-3-5/972)
**Author:** [@Gabriel](https://community.questdb.com/u/Gabriel)\ **Replies:** 5\ **Last updated:** [April 28, 2026, 12:08pm UTC](https://community.questdb.com/t/console-is-freezing-in-9-3-5/972 "2026-04-28T12:08:43Z")
Hello, The issue wasn’t present in 9.3.4 but since I have installed 9.3.5, I got the console looping forever and freezing when trying to add any character to the following code: SELECT \* FROM ( SELECT timestamp, vn, ma… --- ## [QuestDB 9.3.5: Lateral Joins, UNNEST & Window Stats](https://community.questdb.com/t/questdb-9-3-5-lateral-joins-unnest-window-stats/976)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 0\ **Last updated:** [April 22, 2026, 2:45pm UTC](https://community.questdb.com/t/questdb-9-3-5-lateral-joins-unnest-window-stats/976 "2026-04-22T14:45:44Z")
QuestDB 9.3.5 and QuestDB Enterprise 3.2.5 are out. Lateral joins land in QuestDB, UNNEST brings SQL-standard array and JSON expansion, and a new set of statistical window functions covers stddev, variance, covariance, a… --- ## [Unrecoverable storage corruption detected: column version mismatch](https://community.questdb.com/t/unrecoverable-storage-corruption-detected-column-version-mismatch/968)
**Author:** [@BepTheWolf](https://community.questdb.com/u/BepTheWolf)\ **Replies:** 13\ **Last updated:** [April 15, 2026, 3:01pm UTC](https://community.questdb.com/t/unrecoverable-storage-corruption-detected-column-version-mismatch/968 "2026-04-15T15:01:40Z")
Hi everyone. A few days ago I created this table: CREATE TABLE 'sensor\_data' ( index\_time TIMESTAMP, DT VARCHAR, DPB DOUBLE, DPH DOUBLE, RS DOUBLE, HP DOUBLE, SPP DOUBLE, CH DOUBLE, PS1 DOUBLE, PS2 DOUBLE, … --- ## [Using the JVM QuestDB client on a Raspberry PI 3B?](https://community.questdb.com/t/using-the-jvm-questdb-client-on-a-raspberry-pi-3b/969)
**Author:** [@nielsbasjes](https://community.questdb.com/u/nielsbasjes)\ **Replies:** 5\ **Last updated:** [April 13, 2026, 12:18pm UTC](https://community.questdb.com/t/using-the-jvm-questdb-client-on-a-raspberry-pi-3b/969 "2026-04-13T12:18:19Z")
I currently have a Raspberry Pi 3 Model B Plus Rev 1.3 attached to a device (Heatpump in this case) and I’m using some custom software (based on MiNifi) to send the measurements to a very old InfluxDB. I’m moving to Que… --- ## [UPDATE and psycopg2](https://community.questdb.com/t/update-and-psycopg2/963)
**Author:** [@BepTheWolf](https://community.questdb.com/u/BepTheWolf)\ **Replies:** 4\ **Last updated:** [April 2, 2026, 7:37am UTC](https://community.questdb.com/t/update-and-psycopg2/963 "2026-04-02T07:37:41Z")
Hi everyone, a question for Python with psycopg2: in this case: try: with self.connection.cursor() as cursor: cursor.execute(query) If query is an UPDATE operation, can I get a consistent ‘cursor.rowcount… --- ## [QuestDB 9.3.4 and Enterprise 3.2.4: Dynamic WINDOW JOIN, Parquet Bloom Filters, and Array Analytics](https://community.questdb.com/t/questdb-9-3-4-and-enterprise-3-2-4-dynamic-window-join-parquet-bloom-filters-and-array-analytics/964)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 0\ **Last updated:** [April 1, 2026, 11:43am UTC](https://community.questdb.com/t/questdb-9-3-4-and-enterprise-3-2-4-dynamic-window-join-parquet-bloom-filters-and-array-analytics/964 "2026-04-01T11:43:46Z")
QuestDB 9.3.4 and Enterprise 3.2.4 are out. Parquet gets bloom filter pruning and per-column encoding controls, WINDOW JOIN supports dynamic ranges computed from column values, and new element-wise array functions bring … --- ## [Different TTL between primary and replica](https://community.questdb.com/t/different-ttl-between-primary-and-replica/962)
**Author:** [@Gabriel](https://community.questdb.com/u/Gabriel)\ **Replies:** 3\ **Last updated:** [March 27, 2026, 3:03pm UTC](https://community.questdb.com/t/different-ttl-between-primary-and-replica/962 "2026-03-27T15:03:51Z")
Hello, Could you confirm if we can configure with a different (longer TTL) dans the primary base ? For instance, we would like to set TTL at 6 months on the primary and 12 months on the replica. Eventually, we would ev… --- ## [QuestDB 9.3.3 Release](https://community.questdb.com/t/questdb-9-3-3-release/961)
**Author:** [@javier](https://community.questdb.com/u/javier)\ **Replies:** 0\ **Last updated:** [March 23, 2026, 4:40pm UTC](https://community.questdb.com/t/questdb-9-3-3-release/961 "2026-03-23T16:40:36Z")
QuestDB 9.3.3 is here - and HORIZON JOIN is the headline. It is a new join type built for markout analysis: measure how prices evolve at specific time offsets after an event, in a single query. If you have been stitching… --- ## [Lots of small inserts cause a growing WAL. How to handle this?](https://community.questdb.com/t/lots-of-small-inserts-cause-a-growing-wal-how-to-handle-this/960)
**Author:** [@YBrink](https://community.questdb.com/u/YBrink)\ **Replies:** 8\ **Last updated:** [February 19, 2026, 4:37pm UTC](https://community.questdb.com/t/lots-of-small-inserts-cause-a-growing-wal-how-to-handle-this/960 "2026-02-19T16:37:03Z")
Old situation Originally, we were operating on a relational database, with our data grouped by value type\*\*.\*\* All data points from all sources of matching value types were mixed together inside these type‑based tables. … [Next page](https://community.questdb.com/latest.md?page=1)