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| Dejan | hello everybody | 02:49 |
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| grassi | good morning, can i handle a detected deadlock with the usermod command? | 23:14 |
| pboro | handle? | 23:14 |
| grassi | meaning: cope with it. | 23:14 |
| grassi | unlock it. | 23:14 |
| grassi | fix it | 23:14 |
| grassi | ressurect it. | 23:15 |
| grassi | :-) | 23:15 |
| pboro | when ingres detects a deadlock, it "handles" it immediately by "killing" the session | 23:15 |
| grassi | E_DM9042_PAGE_DEADLOCK Deadlock encountered locking page 17020 for table iprotocol9 in database isystem with mode 6. Resource held by session [4198 2aaacb7dc200] Mode 6. | 23:15 |
| grassi | ah | 23:15 |
| grassi | ok. so no action is necessarily neccessary then? | 23:15 |
| pboro | no, as long as your program is able to cope with the deadlocks, since they cause the transaction to roll back | 23:16 |
| pboro | i.e. the action has to be repeated if applicable | 23:16 |
| pboro | do you get a lot of deadlocks? | 23:16 |
| pboro | if you do, then there might be a need to make some changes to the db and the applications using it | 23:16 |
| grassi | not a lot fortunately. | 23:17 |
| grassi | this morning only two users where in the system (bookkeeping), and bam->deadlock. | 23:17 |
| grassi | the session wasn't killed though. | 23:17 |
| pboro | yeah it just stops with an error I guess | 23:17 |
| grassi | deadlock encountered at 07:52:20 | 23:17 |
| grassi | the next client connection abort was 7 minutes later. | 23:18 |
| grassi | ah, ok. | 23:18 |
| grassi | an admin told me once, i have to run usermod dbname tablename to fix the deadlock...?` | 23:18 |
| pboro | that doesn't really fix anything... it simply rebuilds the table structures, which is a good thing to do from time to time as a maintenance | 23:19 |
| pboro | just like running sysmod and optimizedb from time to time | 23:19 |
| grassi | ok. i don't have that scheduled yet... | 23:20 |
| grassi | ok. thanks for the enlightenment, pboro. :-) | 23:22 |
| pboro | no prob | 23:22 |
| pboro | so you're a dba? | 23:22 |
| grassi | haha... no | 23:22 |
| grassi | i never had a proper training. | 23:22 |
| pboro | ok :) | 23:22 |
| grassi | i'm the only admin in a small company, running some citrix, linux, etc. | 23:22 |
| grassi | and have to keep a look on things, running commands from time to time. | 23:23 |
| grassi | and doing backup. | 23:23 |
| grassi | but i know that i don't know what i'm doing ;-) | 23:23 |
| pboro | ok :) | 23:23 |
| grassi | i should really read that ingres bookshelf, next weekend... | 23:23 |
| grassi | *g* | 23:24 |
| pboro | hehe | 23:24 |
| pboro | at least figure out what usermod, sysmod and optimizedb are for and how to automate them to keep your db working well | 23:24 |
| grassi | automatization is my middle name... ok. i'll do that | 23:25 |
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