annotate mod_log_events_by_memory/README.markdown @ 5139:449e4ca4de32

mod_unified_push: Remove dependency on trunk util.jwt (0.12 compat) This should allow the module to work on 0.12, while preserving expiry checking (which was not built in to 0.12's util.jwt).
author Matthew Wild <mwild1@gmail.com>
date Tue, 10 Jan 2023 16:34:21 +0000
parents f781a90018f4
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1 This module compares the memory usage reported by Lua before and after
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2 each event and reports it to the log if it exceeds the configuration
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3 setting `log_memory_threshold` (in bytes).
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4
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5 ``` lua
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6 log_memory_threshold = 20*1024
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7 ```
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8
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9 If you are looking to identify memory leaks, please first read [Three
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10 kinds of memory
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11 leaks](https://blog.nelhage.com/post/three-kinds-of-leaks/).
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12
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13 Prosody runs on Lua which uses automatic memory management with garbage
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14 collection, so the numbers reported by this module are very likely to be
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15 useless for the purpose of identifying memory leaks. Large, but
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16 temporary, increases in memory usage can however highlight other kinds
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17 of performance problems and sometimes even provide hits for where to
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18 look for memory leaks.