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Using 4 times the number\nof possible entries for real addresses should reduce collisions quite\na bit while also leaving some headroom for the virtual addresses hash\nwhere a client might have more than one address.\n\nA reason to keep the limit so low are the memory requirements. Each\nbucket has the size of one linked-list pointer (4 byte or 32 bit and\n8 byte for 64 bit). So 256 buckets use 1 or 2 kB while 4096 will use\n16 kB or 32 kB.\n\nWhen the current limit was set 20 years ago this might have been a\nmeaningful memory saving but today the collision probability is\nmore important.\n\nChange-Id: Ia699b0dfa407ac377970bb130434298eaaec592b\nSigned-off-by: Arne Schwabe \u003carne@rfc2549.org\u003e\n"},"branch":"refs/heads/master"},"be9d1d3c47532c70fd2c0209446d2999a1e82ffb":{"kind":"TRIVIAL_REBASE","_number":6,"created":"2026-03-19 14:17:13.000000000","uploader":{"_account_id":1000003,"name":"plaisthos","display_name":"Arne Schwabe","email":"arne-openvpn@rfc2549.org","username":"plaisthos"},"ref":"refs/changes/63/1563/6","fetch":{"anonymous http":{"url":"http://gerrit.openvpn.net/openvpn","ref":"refs/changes/63/1563/6","commands":{"Branch":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/6 \u0026\u0026 git checkout -b change-1563 FETCH_HEAD","Checkout":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/6 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/6 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/6 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull http://gerrit.openvpn.net/openvpn refs/changes/63/1563/6","Reset To":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/6 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a04a3cedd41a3b552e56d19dafc7042b95dd527d","subject":"ssl_mbedtls: Avoid conversion and sign-compare warnings"}],"author":{"name":"Arne Schwabe","email":"arne@rfc2549.org","date":"2026-01-07 16:46:35.000000000","tz":60},"committer":{"name":"Arne Schwabe","email":"arne@rfc2549.org","date":"2026-03-19 11:18:53.000000000","tz":60},"subject":"Increase default size of internal hash maps to 4 * --max-clients","message":"Increase default size of internal hash maps to 4 * --max-clients\n\nThe default of 256 seems quite low as with (at least) 1024 possible\nentries we have a guaranteed collisions. Using 4 times the number\nof possible entries for real addresses should reduce collisions quite\na bit while also leaving some headroom for the virtual addresses hash\nwhere a client might have more than one address.\n\nA reason to keep the limit so low are the memory requirements. Each\nbucket has the size of one linked-list pointer (4 byte or 32 bit and\n8 byte for 64 bit). So 256 buckets use 1 or 2 kB while 4096 will use\n16 kB or 32 kB.\n\nWhen the current limit was set 20 years ago this might have been a\nmeaningful memory saving but today the collision probability is\nmore important.\n\nChange-Id: Ia699b0dfa407ac377970bb130434298eaaec592b\nSigned-off-by: Arne Schwabe \u003carne@rfc2549.org\u003e\n"},"branch":"refs/heads/master"},"ff865d650f47afb9617191ac5aad73cddb218f41":{"kind":"NO_CODE_CHANGE","_number":7,"created":"2026-03-19 14:55:47.000000000","uploader":{"_account_id":1000003,"name":"plaisthos","display_name":"Arne Schwabe","email":"arne-openvpn@rfc2549.org","username":"plaisthos"},"ref":"refs/changes/63/1563/7","fetch":{"anonymous http":{"url":"http://gerrit.openvpn.net/openvpn","ref":"refs/changes/63/1563/7","commands":{"Branch":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/7 \u0026\u0026 git checkout -b change-1563 FETCH_HEAD","Checkout":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/7 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/7 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/7 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull http://gerrit.openvpn.net/openvpn refs/changes/63/1563/7","Reset To":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/7 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"a04a3cedd41a3b552e56d19dafc7042b95dd527d","subject":"ssl_mbedtls: Avoid conversion and sign-compare warnings"}],"author":{"name":"Arne Schwabe","email":"arne@rfc2549.org","date":"2026-01-07 16:46:35.000000000","tz":60},"committer":{"name":"Arne Schwabe","email":"arne@rfc2549.org","date":"2026-03-19 14:54:25.000000000","tz":60},"subject":"Increase default size of internal hash maps to 4 * --max-clients","message":"Increase default size of internal hash maps to 4 * --max-clients\n\nThe default of 256 seems quite low as with (at least) 1024 possible\nentries (the --max-clients default setting) we have a guaranteed\ncollisions. Using 4 times the number of possible entries for real\naddresses should reduce collisions quite a bit while also leaving\nsome headroom for the virtual addresses hash where a client might\nhave more than one address.\n\nA reason to keep the limit so low are the memory requirements. Each\nbucket has the size of one linked-list pointer (4 byte or 32 bit and\n8 byte for 64 bit). So 256 buckets use 1 or 2 kB while 4096 will use\n16 kB or 32 kB.\n\nWhen the current limit was set 20 years ago this might have been a\nmeaningful memory saving but today the collision probability is\nmore important.\n\nChange-Id: Ia699b0dfa407ac377970bb130434298eaaec592b\nSigned-off-by: Arne Schwabe \u003carne@rfc2549.org\u003e\n"},"branch":"refs/heads/master"},"7b5ebf7c447db16953c9541fdd00c7aa56124fc5":{"kind":"TRIVIAL_REBASE_WITH_MESSAGE_UPDATE","_number":8,"created":"2026-03-26 14:49:38.000000000","uploader":{"_account_id":1000002,"name":"cron2","display_name":"Gert Doering","email":"gert@greenie.muc.de","username":"cron2"},"ref":"refs/changes/63/1563/8","fetch":{"anonymous http":{"url":"http://gerrit.openvpn.net/openvpn","ref":"refs/changes/63/1563/8","commands":{"Branch":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/8 \u0026\u0026 git checkout -b change-1563 FETCH_HEAD","Checkout":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/8 \u0026\u0026 git checkout FETCH_HEAD","Cherry Pick":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/8 \u0026\u0026 git cherry-pick FETCH_HEAD","Format Patch":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/8 \u0026\u0026 git format-patch -1 --stdout FETCH_HEAD","Pull":"git pull http://gerrit.openvpn.net/openvpn refs/changes/63/1563/8","Reset To":"git fetch http://gerrit.openvpn.net/openvpn refs/changes/63/1563/8 \u0026\u0026 git reset --hard FETCH_HEAD"}}},"commit":{"parents":[{"commit":"3316a18ebe6669d5e31b17ab0356a533b846d1bc","subject":"Use const specifices in extract_x509_field_ssl"}],"author":{"name":"Arne Schwabe","email":"arne@rfc2549.org","date":"2026-03-25 12:45:26.000000000","tz":60},"committer":{"name":"Gert Doering","email":"gert@greenie.muc.de","date":"2026-03-26 14:45:49.000000000","tz":60},"subject":"Increase default size of internal hash maps to 4 * --max-clients","message":"Increase default size of internal hash maps to 4 * --max-clients\n\nThe default of 256 seems quite low as with (at least) 1024 possible\nentries (the --max-clients default setting) we have a guaranteed\ncollisions. Using 4 times the number of possible entries for real\naddresses should reduce collisions quite a bit while also leaving\nsome headroom for the virtual addresses hash where a client might\nhave more than one address.\n\nA reason to keep the limit so low are the memory requirements. Each\nbucket has the size of one linked-list pointer (4 byte or 32 bit and\n8 byte for 64 bit). So 256 buckets use 1 or 2 kB while 4096 will use\n16 kB or 32 kB.\n\nWhen the current limit was set 20 years ago this might have been a\nmeaningful memory saving but today the collision probability is\nmore important.\n\nChange-Id: Ia699b0dfa407ac377970bb130434298eaaec592b\nSigned-off-by: Arne Schwabe \u003carne@rfc2549.org\u003e\nAcked-by: Antonio Quartulli \u003cantonio@mandelbit.com\u003e\nGerrit URL: https://gerrit.openvpn.net/c/openvpn/+/1563\nMessage-Id: \u003c20260325124526.124049-1-frank@lichtenheld.com\u003e\nURL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg36268.html\nSigned-off-by: Gert Doering \u003cgert@greenie.muc.de\u003e\n"},"branch":"refs/heads/master"}},"requirements":[],"submit_records":[],"submit_requirements":[]}