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< h1 id = "request-log-format" > < a class = "header" href = "#request-log-format" > Request log format< / a > < / h1 >
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< p > HTTP request logs are written by synapse (see < a href = "https://github.com/element-hq/synapse/tree/develop/synapse/http/site.py" > < code > synapse/http/site.py< / code > < / a > for details).< / p >
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< p > See the following for how to decode the dense data available from the default logging configuration.< / p >
< pre > < code > 2020-10-01 12:00:00,000 - synapse.access.http.8008 - 311 - INFO - PUT-1000- 192.168.0.1 - 8008 - {another-matrix-server.com} Processed request: 0.100sec/-0.000sec (0.000sec, 0.000sec) (0.001sec/0.090sec/3) 11B !200 " PUT /_matrix/federation/v1/send/1600000000000 HTTP/1.1" " Synapse/1.20.1" [0 dbevts]
-AAAAAAAAAAAAAAAAAAAAA- -BBBBBBBBBBBBBBBBBBBBBB- -C- -DD- -EEEEEE- -FFFFFFFFF- -GG- -HHHHHHHHHHHHHHHHHHHHHHH- -IIIIII- -JJJJJJJ- -KKKKKK-, -LLLLLL- -MMMMMMM- -NNNNNN- O -P- -QQ- -RRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRR- -SSSSSSSSSSSS- -TTTTTT-
< / code > < / pre >
< table > < thead > < tr > < th > Part< / th > < th > Explanation< / th > < / tr > < / thead > < tbody >
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< tr > < td > AAAA< / td > < td > Timestamp request was logged (not received)< / td > < / tr >
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< tr > < td > BBBB< / td > < td > Logger name (< code > synapse.access.(http\|https).< tag> < / code > , where 'tag' is defined in the < a href = "../configuration/config_documentation.html#listeners" > < code > listeners< / code > < / a > config section, normally the port)< / td > < / tr >
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< tr > < td > CCCC< / td > < td > Line number in code< / td > < / tr >
< tr > < td > DDDD< / td > < td > Log Level< / td > < / tr >
< tr > < td > EEEE< / td > < td > Request Identifier (This identifier is shared by related log lines)< / td > < / tr >
< tr > < td > FFFF< / td > < td > Source IP (Or X-Forwarded-For if enabled)< / td > < / tr >
< tr > < td > GGGG< / td > < td > Server Port< / td > < / tr >
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< tr > < td > HHHH< / td > < td > Federated Server or Local User making request (blank if unauthenticated or not supplied).< br / > If this is of the form `@aaa:example.com< / td > < / tr >
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< tr > < td > IIII< / td > < td > Total Time to process the request< / td > < / tr >
< tr > < td > JJJJ< / td > < td > Time to send response over network once generated (this may be negative if the socket is closed before the response is generated)< / td > < / tr >
< tr > < td > KKKK< / td > < td > Userland CPU time< / td > < / tr >
< tr > < td > LLLL< / td > < td > System CPU time< / td > < / tr >
< tr > < td > MMMM< / td > < td > Total time waiting for a free DB connection from the pool across all parallel DB work from this request< / td > < / tr >
< tr > < td > NNNN< / td > < td > Total time waiting for response to DB queries across all parallel DB work from this request< / td > < / tr >
< tr > < td > OOOO< / td > < td > Count of DB transactions performed< / td > < / tr >
< tr > < td > PPPP< / td > < td > Response body size< / td > < / tr >
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< tr > < td > QQQQ< / td > < td > Response status code< br / > Suffixed with < code > !< / code > if the socket was closed before the response was generated.< br / > A < code > 499!< / code > status code indicates that Synapse also cancelled request processing after the socket was closed.< br / > < / td > < / tr >
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< tr > < td > RRRR< / td > < td > Request< / td > < / tr >
< tr > < td > SSSS< / td > < td > User-agent< / td > < / tr >
< tr > < td > TTTT< / td > < td > Events fetched from DB to service this request (note that this does not include events fetched from the cache)< / td > < / tr >
< / tbody > < / table >
< p > MMMM / NNNN can be greater than IIII if there are multiple slow database queries
running in parallel.< / p >
< p > Some actions can result in multiple identical http requests, which will return
the same data, but only the first request will report time/transactions in
< code > KKKK< / code > /< code > LLLL< / code > /< code > MMMM< / code > /< code > NNNN< / code > /< code > OOOO< / code > - the others will be awaiting the first query to return a
response and will simultaneously return with the first request, but with very
small processing times.< / p >
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