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Josh Steadmon 83e57b04e6 trace2: discard new traces if target directory has too many files 
trace2 can write files into a target directory. With heavy usage, this
directory can fill up with files, causing difficulty for
trace-processing systems.

This patch adds a config option (trace2.maxFiles) to set a maximum
number of files that trace2 will write to a target directory. The
following behavior is enabled when the maxFiles is set to a positive
integer:
  When trace2 would write a file to a target directory, first check
  whether or not the traces should be discarded. Traces should be
  discarded if:
    * there is a sentinel file declaring that there are too many files
    * OR, the number of files exceeds trace2.maxFiles.
  In the latter case, we create a sentinel file named git-trace2-discard
  to speed up future checks.

The assumption is that a separate trace-processing system is dealing
with the generated traces; once it processes and removes the sentinel
file, it should be safe to generate new trace files again.

The default value for trace2.maxFiles is zero, which disables the file
count check.

The config can also be overridden with a new environment variable:
GIT_TRACE2_MAX_FILES.

Signed-off-by: Josh Steadmon <steadmon@google.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2019-10-05 17:53:51 +09:00
..
add.txt
advice.txt Merge branch 'ra/cherry-pick-revert-skip' 2019-07-19 11:30:21 -07:00
alias.txt config/alias.txt: document alias accepting non-command first word 2019-06-06 09:33:42 -07:00
am.txt
apply.txt
blame.txt blame: add config options for the output of ignored or unblamable lines 2019-05-16 11:36:23 +09:00
branch.txt Merge branch 'nd/switch-and-restore' 2019-07-09 15:25:44 -07:00
browser.txt
checkout.txt switch: no worktree status unless real branch switch happens 2019-04-02 13:57:00 +09:00
clean.txt
color.txt doc: fix repeated words 2019-08-11 17:40:07 -07:00
column.txt
commit.txt
completion.txt
core.txt repo-settings: create feature.manyFiles setting 2019-08-13 13:33:55 -07:00
credential.txt
diff.txt Merge branch 'sg/diff-indent-heuristic-non-experimental' 2019-09-09 12:26:36 -07:00
difftool.txt
fastimport.txt
feature.txt fetch: add fetch.writeCommitGraph config setting 2019-09-03 12:06:14 -07:00
fetch.txt fetch: add fetch.writeCommitGraph config setting 2019-09-03 12:06:14 -07:00
filter.txt config.txt: move filter.* to a separate file 2018-10-29 10:17:01 +09:00
fmt-merge-msg.txt config.txt: move fmt-merge-msg-config.txt to config/ 2018-10-29 10:17:01 +09:00
format.txt config/format.txt: specify default value of format.coverLetter 2019-09-05 12:58:52 -07:00
fsck.txt config/fsck.txt: avoid starting line with dash 2019-03-07 09:25:32 +09:00
gc.txt commit-graph: turn on commit-graph by default 2019-08-13 13:33:55 -07:00
gitcvs.txt config.txt: move gitcvs-config.txt to config/ 2018-10-29 10:17:01 +09:00
gitweb.txt config.txt: move gitweb.* to a separate file 2018-10-29 10:17:01 +09:00
gpg.txt Merge branch 'rm/gpg-program-doc-fix' into maint 2019-07-29 12:38:12 -07:00
grep.txt config.txt: move grep.* to a separate file 2018-10-29 10:17:01 +09:00
gui.txt config.txt: move gui-config.txt to config/ 2018-10-29 10:17:02 +09:00
guitool.txt config.txt: move guitool.* to a separate file 2018-10-29 10:17:02 +09:00
help.txt config.txt: move help.* to a separate file 2018-10-29 10:17:02 +09:00
http.txt Merge branch 'fc/http-version' 2019-01-04 13:33:32 -08:00
i18n.txt config.txt: move i18n.* to a separate file 2018-10-29 10:17:02 +09:00
imap.txt git-imap-send.txt: move imap.* to a separate file 2018-10-29 10:17:02 +09:00
index.txt repo-settings: create feature.manyFiles setting 2019-08-13 13:33:55 -07:00
init.txt config.txt: move init.* to a separate file 2018-10-29 10:17:02 +09:00
instaweb.txt config.txt: move instaweb.* to a separate file 2018-10-29 10:17:02 +09:00
interactive.txt checkout: split part of it to new command 'restore' 2019-05-07 13:04:47 +09:00
log.txt log: really flip the --mailmap default 2019-08-02 09:55:03 -07:00
mailinfo.txt config.txt: move mailinfo.* to a separate file 2018-10-29 10:17:02 +09:00
mailmap.txt config.txt: move mailmap.* to a separate file 2018-10-29 10:17:03 +09:00
man.txt config.txt: move man.* to a separate file 2018-10-29 10:17:03 +09:00
merge.txt merge-recursive: switch directory rename detection default 2019-04-08 16:02:08 +09:00
mergetool.txt config.txt: move mergetool.* to a separate file 2018-10-29 10:17:03 +09:00
notes.txt config.txt: move notes.* to a separate file 2018-10-29 10:17:03 +09:00
pack.txt repo-settings: create feature.experimental setting 2019-08-13 13:33:55 -07:00
pager.txt config.txt: move pager.* to a separate file 2018-10-29 10:17:03 +09:00
pretty.txt config.txt: move pretty.* to a separate file 2018-10-29 10:17:03 +09:00
protocol.txt config.txt: move protocol.* to a separate file 2018-10-29 10:17:03 +09:00
pull.txt rebase: deprecate --preserve-merges 2019-03-12 16:29:00 +09:00
push.txt config.txt: move push-config.txt to config/ 2018-10-29 10:17:03 +09:00
rebase.txt rebase: remove the rebase.useBuiltin setting 2019-03-20 09:25:10 +09:00
receive.txt config.txt: move receive-config.txt to config/ 2018-10-29 10:17:03 +09:00
remote.txt remote: add promisor and partial clone config to the doc 2019-06-25 14:05:38 -07:00
remotes.txt config.txt: move remotes.* to a separate file 2018-10-29 10:17:03 +09:00
repack.txt repack: enable bitmaps by default on bare repos 2019-03-18 14:09:54 +09:00
rerere.txt config.txt: move rerere.* to a separate file 2018-10-29 10:17:04 +09:00
reset.txt config.txt: move reset.* to a separate file 2018-10-29 10:17:04 +09:00
sendemail.txt config.txt: move sendemail-config.txt to config/ 2018-10-29 10:17:04 +09:00
sequencer.txt config.txt: move sequencer.* to a separate file 2018-10-29 10:17:04 +09:00
showbranch.txt config.txt: move showBranch.* to a separate file 2018-10-29 10:17:04 +09:00
splitindex.txt config.txt: move splitIndex.* to a separate file 2018-10-29 10:17:04 +09:00
ssh.txt config.txt: move ssh.* to a separate file 2018-10-29 10:17:02 +09:00
stash.txt doc: fix repeated words 2019-08-11 17:40:07 -07:00
status.txt status: add status.aheadbehind setting 2019-06-21 09:35:00 -07:00
submodule.txt config.txt: move submodule.* to a separate file 2018-10-29 10:17:04 +09:00
tag.txt tag: add tag.gpgSign config option to force all tags be GPG-signed 2019-06-05 14:39:28 -07:00
trace2.txt trace2: discard new traces if target directory has too many files 2019-10-05 17:53:51 +09:00
transfer.txt doc: typo: s/can not/cannot/ and s/is does/does/ 2019-08-05 10:05:24 -07:00
uploadarchive.txt config.txt: move uploadarchive.* to a separate file 2018-10-29 10:17:04 +09:00
uploadpack.txt config.txt: move uploadpack.* to a separate file 2018-10-29 10:17:04 +09:00
url.txt config.txt: move url.* to a separate file 2018-10-29 10:17:04 +09:00
user.txt config: allow giving separate author and committer idents 2019-02-04 12:18:13 -08:00
versionsort.txt config.txt: move versionsort.* to a separate file 2018-10-29 10:17:05 +09:00
web.txt config.txt: move web.* to a separate file 2018-10-29 10:17:05 +09:00
worktree.txt doc/config: do a better job of introducing 'worktree.guessRemote' 2018-12-28 13:27:11 -08:00