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16kB buffers are not enough to dump 4096 threads with up to 10 bytes value on each line. By storing the column number in the applet's context, we can now restart from the last attempted column. This requires to dump all values as they are produced, but it doesn't cost that much: a 4096-thread output from a fesh process produces 300kB of output in ~8ms, or ~400us per call (19*16kB), most of which are spent in vfprintf(). Given that we don't print more than needed, it doesn't really change anything. The main caveat is that when interrupted on such large lines, there's a great possibility that the total or average on the first column doesn't match anymore the sum or average of all dumped values. In order to avoid this whenever possible (typically less than ~1500 threads), we first try to dump entire lines and only proceed one column at a time when we have to retry a failed dump. This is already the same for other stats that are dumped in an interruptible way anyway and there's little that can be done about it at this point (and not much immediately perceived benefit in doing this with extreme accuracy for >1500 threads). |
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| INSTALL | ||
| LICENSE | ||
| MAINTAINERS | ||
| Makefile | ||
| README | ||
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The HAProxy documentation has been split into a number of different files for ease of use. Please refer to the following files depending on what you're looking for : - INSTALL for instructions on how to build and install HAProxy - BRANCHES to understand the project's life cycle and what version to use - LICENSE for the project's license - CONTRIBUTING for the process to follow to submit contributions The more detailed documentation is located into the doc/ directory : - doc/intro.txt for a quick introduction on HAProxy - doc/configuration.txt for the configuration's reference manual - doc/lua.txt for the Lua's reference manual - doc/SPOE.txt for how to use the SPOE engine - doc/network-namespaces.txt for how to use network namespaces under Linux - doc/management.txt for the management guide - doc/regression-testing.txt for how to use the regression testing suite - doc/peers.txt for the peers protocol reference - doc/coding-style.txt for how to adopt HAProxy's coding style - doc/internals for developer-specific documentation (not all up to date)