Re: Please help with this error message
От | Chris Smith |
---|---|
Тема | Re: Please help with this error message |
Дата | |
Msg-id | 006d01c2f3f8$945fa3d0$6700000a@KYA обсуждение исходный текст |
Ответ на | Please help with this error message ("Chris Smith" <cdsmith@twu.net>) |
Список | pgsql-general |
> Can you provide a test case that makes it happen? I'm prepared to > believe there's a bug here, but the simple fact of the error message > is certainly not enough to find the bug :-( Thanks, Tom. I didn't intend for this to be a bug report (if I had, I'd have sent it to the bugs list instead.) I just wanted to know if others had ideas. Looks like I'll try to get these memory checks in place, and then see what happens. I have been trying to get a test case put together. Unfortunately, I haven't been able to do so. On our production systems, it generally takes about three days of hitting the database pretty hard for this to turn up once... and I don't have anything close to the production system available for testing. I think it will be difficult to reproduce the problem in a reasonable length of time. I have put together an application that generates about the same distribution of sizes for the bytea field, and does a continual series of insert/read sequences to ensure that they show up right... that's making an assumption, though, that the record is getting corrupted right from the get-go, rather than by other actions later on; perhaps a bad one, so I'm thinking of rewriting it to have a thread do inserts, and another keep randomly reading the inserted fields out of order. Maybe that will make it more reproducable. I also have obtained permission to shut down a production system tonight and leave my test app running overnight, with actual production traffic pointing to the failover server. That would provide extra data for diagnosing as a hardware issue (if I can reproduce easily on production but not at all elsewhere, for example) and give a more powerful machine, which would allow more testing to happen in less time. I'll let you know if I turn up anything that looks suspicious by tomorrow morning. -- www.designacourse.com The Easiest Way to Train Anyone... Anywhere. Chris Smith - Lead Software Developer/Technical Trainer MindIQ Corporation
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