Re: ERROR: "invalid memory alloc request size" or "unexpected end of data" on large table
От | Stephane Bailliez |
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Тема | Re: ERROR: "invalid memory alloc request size" or "unexpected end of data" on large table |
Дата | |
Msg-id | 4739BD8A.2080203@gmail.com обсуждение исходный текст |
Ответ на | Re: ERROR: "invalid memory alloc request size" or "unexpected end of data" on large table (Tom Lane <tgl@sss.pgh.pa.us>) |
Список | pgsql-performance |
Tom Lane wrote: > This sounds like corrupt data --- specifically, 1664639562 showing > up where a variable-width field's length word ought to be. It > may or may not be relevant that the ASCII equivalent of that bit > pattern is Jb8c ... do you work with data that contains such > substrings? > Not specifically but I cannot rule it out entirely, it 'could' be in one of the column which may have a combination of uppercase/lowercase/number otherwise all other text entries would be lowercase. > If it's not 100% repeatable I'd start to wonder about flaky hardware. > Have you run memory and disk diagnostics on this machine recently? I did extensive tests a month or two ago (long crunching queries running non stop for 24h) which were ok but honestly cannot say I'm not very trusty in this particular hardware. Would need to put it offline and memtest it for good obviously. I moved some data (and a bit more, same table has 35M rows) to another machine (also 8.1.10 on ubuntu with 2.6.17-10 smp, 2 Xeon 2GHZ instead of P4 3GHz) and it passes with flying colors (though it's much much slower with the same settings so I need to check a few things in there, I had tmp dir topping 3GB so not sure if I could have more in memory) Thanks for the insight, Tom. -- stephane
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