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Failed to connect to MySQL: (1203) User howardkn already has more than 'max_user_connections' active connectionsPath: ...!news.mixmin.net!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Kaz Kylheku <643-408-1753@kylheku.com> Newsgroups: comp.unix.shell,comp.unix.programmer,comp.lang.misc Subject: Re: Python (was Re: I did not inhale) Date: Mon, 19 Aug 2024 17:40:59 -0000 (UTC) Organization: A noiseless patient Spider Lines: 27 Message-ID: <20240819103934.850@kylheku.com> References: <20240408075547.000061e8@gmail.com> <20240412094809.811@kylheku.com> <87il0mm94y.fsf@tudado.org> <87il0lldf8.fsf@tudado.org> <20240815182717.189@kylheku.com> <20240818094145.827@kylheku.com> <20240818215317.300@kylheku.com> Injection-Date: Mon, 19 Aug 2024 19:40:59 +0200 (CEST) Injection-Info: dont-email.me; posting-host="896f64b1942145a2d62fd9abf0eabcbc"; logging-data="3110786"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/nb4kOt/V2BJBsALB57Taj6pD66PPK3SI=" User-Agent: slrn/pre1.0.4-9 (Linux) Cancel-Lock: sha1:RLdtyA8ISNOU2qMyfvNHKXlniwY= Bytes: 2736 On 2024-08-19, Dmitry A. Kazakov wrote: > On 2024-08-19 06:54, Kaz Kylheku wrote: >> On 2024-08-18, Dmitry A. Kazakov wrote: >>> On 2024-08-18 18:46, Kaz Kylheku wrote: >>> >>>> If a mutex is actually used to protect shared data against concurrent ^^^^^^^^^^^^^^^^^^^^^^ >>>> access, and the owner dies while holding the mutex, the next thread >>>> to try to grab the mutex must be informed so it can try to recover >>>> the shared data into a sane state. >>> >>> There is no recovery if a protected operation crashes, because the state >>> of the object is unknown. >> >> That is false; the object's state can be analyzed and repaired. > > The object must be designed in a special way in order to support roll > backs etc. Such techniques exclude concurrent access, e.g. memory is ^^^^^^^^^^^^^^^^^^^^^^^^^^ > never overwritten etc. Doh. -- TXR Programming Language: http://nongnu.org/txr Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal Mastodon: @Kazinator@mstdn.ca