MDB_STAT(1)

✨ mdb_stat — the LMDB environment status tool ✨

okay bestie so you know how this page is MDB_STAT(1) from the General Commands Manual? yeah. it's your girl mdb_stat, and she's here to spill all the tea about your LMDB environment. 🫖💅

🌸 NAME 🌸

mdb_stat — the LMDB environment status tool. she looks at your environment and tells you everything going on in there. nosy in the best way. 👑

🌈 SYNOPSIS 🌈

mdb_stat [-V] [-e] [-f[f[f]]] [-n] [-r[r]] [-a | -s subdb] envpath

look at her. all those little flags. every single one matters, okay? don't skip any. 🎀

💖 DESCRIPTION 💖

The mdb_stat utility displays the status of an LMDB environment. that's it, that's the job, and she does it flawlessly. 💅

✨ OPTIONS ✨

okay so here's every single flag, no skipping, i don't make the rules (i do, actually, and i said keep them all):

• -V — writes the library version number straight to standard output, and then she dips. exits immediately. bye bestie 👋
• -e — shows you the info about the database environment itself. the whole vibe check. 🦋
• -f — shows info about the environment freelist. and if you give her -ff? she summarizes each freelist entry. and if you go full -fff? she displays the full list of page IDs in the freelist. escalating. obsessed. 🔥
• -n — displays the status of an LMDB database that does not use subdirectories. noted.
• -r — shows info about the environment reader table. she gives you the process ID, the thread ID, and the transaction ID for each active reader slot. important deets: the process ID and transaction ID are in decimal, and the thread ID is in hexadecimal. if the reader doesn't currently have a read transaction open, the transaction ID shows up as "-". and if you give her -rr? she checks for stale entries in the reader table and clears them, then prints the reader table again after the check is done. she cleans up and shows receipts. 💅
• -a — displays the status of all of the subdatabases in the environment. every single one. periodt.
• -s subdb — displays the status of a specific subdatabase. just the one you asked for. main character energy only. 👑

also heads up: -a and -s subdb are an either/or situation, look at the synopsis, they're separated by that | for a reason bestie 💖

🫶 DIAGNOSTICS 🫶

exit status is zero if no errors occur. if something goes wrong? non-zero exit status, and a diagnostic message gets written to standard error. she will tell you. loudly. 😭

🎀 SEE ALSO 🎀

• mdb_copy(1) — go read that one too, iykyk 🦋

💜 AUTHOR 💜

Howard Chu of Symas Corporation <http://www.symas.com> — legend behavior, no cap. 👑

and that's the whole page bestie, you're officially fluent in mdb_stat. this was LMDB 0.9.17, dated 2015/09/30, and honestly? iconic. go stat something. 💖✨🎀🦋🌸💅