The primary benefit is that objects can allocate memory for their struct with the context, which saves an additional allocation and makes it easier to read context/allocation dumps. Also, the memory context does not need to be stored with the object since it can be determined using the object pointer.
Object pointers cannot be moved, so this means whatever additional memory is allocated cannot be resized. That makes the additional memory ideal for object structs, but not so much for allocating a list that might change size.
Mem contexts can no longer be reused since they will probably be the wrong size so their memory is freed on memContextFree(). This still means fewer allocations and frees overall.
Interfaces still need to be freed by mem context so the old objMove() and objFree() have been preserved as objMoveContext() and objFreeContext(). This will be addressed in a future commit.
The prior limitations were based on using getopt_long() to parse command-line options, which required a static list of allowed options. Setting index max too high bloated the binary unacceptably. 45a4e80 replaced the functionality of getopt_long() but the static list remained.
Improve cfgParseOption() to use available option data and remove the need for a static list. This also allows the option deprecations to be represented more compactly.
Index max is still capped at 256 because a large enough index could cause parseOptionIdxValue() to run out of memory since it allocates a static list based on the highest index found. If that function were improved with a map of found index values then index max could be set to UINT64_MAX.
Note that deprecations no longer set an index max or define whether reset is valid. These were space-saving measures which are no longer required. This means that indexed deprecated options will also be valid up to 256 and always allow reset, but it doesn't seem worth additional code to limit this behavior.
cfgParseOptionId() is no longer needed because calling cfgParseOption() with .ignoreMissingIndex = true duplicates the functionality of cfgParseOptionId(). This leads to some simplification in the help code.
The certs are available in test/certificate so it makes more sense to use them there. In addition the container does not need to be rebuilt unless the CA cert changes.
contextParentIdx was introduced in 90709dfd to improve the performance of mem context frees. memContextMove() did not get the message, however, and continued to use a loop to find the mem context in the old parent.
Use contextParentIdx to find the mem context in the old parent to avoid a loop.
The MEM_CONTEXT_NEW*() block will automatically free memory if there is an error.
This code is pretty old so this may not have been true when it was written.
IMPORTANT NOTE: The log level for copied files in the backup/restore commands has been changed to detail. This makes the info log level less noisy but if these messages are required then set the log level for the backup/restore commands to detail.
Bug Fixes:
* Detect errors in S3 multi-part upload finalize. (Reviewed by Cynthia Shang, Marco Montagna. Reported by Marco Montagna, Lev Kokotov, Anderson A. Mallmann.)
* Fix detection of circular symlinks. (Reviewed by Stefan Fercot. Reported by Rohit Raveendran.)
* Only pass selected repo options to the remote. (Reviewed by David Christensen, Cynthia Shang. Reported by Greg Sabino Mullane, David Christensen.)
Improvements:
* Binary protocol. (Reviewed by Cynthia Shang.)
* Automatically create data directory on restore. (Contributed by Stefan Fercot. Reviewed by David Steele. Suggested by Chris Bandy.)
* Allow restore --type=lsn. (Contributed by Stefan Fercot. Reviewed by Cynthia Shang. Suggested by James Coleman.)
* Change level of backup/restore copied file logging to detail. (Reviewed by Stefan Fercot. Suggested by Jens Wilke.)
* Loop while waiting for checkpoint LSN to reach replay LSN. (Contributed by Stefan Fercot. Reviewed by David Steele. Suggested by Fatih Mencutekin.)
* Log backup file total and restore size/file total. (Reviewed by Cynthia Shang.)
Documentation Bug Fixes:
* Fix incorrect host names in user guide. (Reviewed by Stefan Fercot. Reported by Greg Sabino Mullane.)
Documentation Improvements:
* Update contributing documentation and add pull request template. (Contributed by Cynthia Shang. Reviewed by David Steele.)
* Rearrange backup documentation in user guide. (Reviewed by Cynthia Shang.)
* Clarify restore --type behavior in command reference. (Contributed by Cynthia Shang. Reviewed by David Steele.)
* Fix documentation and comment typos. (Contributed by Eric Radman. Reviewed by David Steele.)
Test Suite Improvements:
* Add check for test path inside repo path. (Reviewed by Greg Sabino Mullane. Suggested by Greg Sabino Mullane.)
* Add CodeQL static code analysis. (Reviewed by Cynthia Shang.)
* Update tests to use standard patterns. (Contributed by Cynthia Shang. Reviewed by David Steele.)
Coverity complains that "Argument loaded of ASSERT() has a side effect because the variable is volatile. The containing function might work differently in a non-debug build."
It does not look like this is a real issue, but a CHECK() here is not too expensive for production so change it to silence Coverity.
Also fix a typo in the comment.
This loop has been dead since the code was initially committed in ad79932b. It looks like it was used at one point but became dead when the enclosing if-else was added during development.
Found by Coverity.
This eliminates repetition of the build path so it can be changed more easily.
Also create the build path explicitly rather than suggest that the user do it.
The standby memory was set to 1024mb in 86a651f9 to compensate for a memory leak in restore. The leak has been fixed (or at least mitigated) in e1e6e475 and 4fb6384f so the memory can be reduced to 512mb, the same as the primary.
The error was written to the client and then another command read. If the write did not fail then the loop would never exit.
Instead exit on any error that is not raised by the command handler as we can pretty safely assume this is an unrecoverable protocol error. The command handler might throw a protocol error itself, but this should be caught in the next read or write in the main loop.
If the buffer was not full at EOF then ioReadSmall() would get stuck in an infinite loop. Instead, return on EOF even if the buffer is not full.
This is not an issue in released versions since ioReadSmall() is not being used.
Also fix a comment typo.
Either of these temp mem context blocks fixes the issue of command packs not being freed, but it seems like a good idea to have both in case the code changes.
Restore definitely needed to be doing cleanup, just as backup does. The archive-get, archive-push, and verify loop did not seem to be a significant source of leaks but that could change in the future so add resets.
Add temp mem context blocks in the job callbacks where they were missing.
Also switch to the prior context when creating a job, if possible, to save a move.
This is intended to provide pre-release stress-testing. Include container memory limits to help check for memory leaks.
Also add parallelism to make for faster builds.
The backup size was a bit off because it did not include any files (e.g. backup_label, WAL files) that were added to the manifest after the main copy. To fix this move the log message to the very end of the backup.
Add size/file total log message to restore since it did not exist before.
Remove the "Automatic Stop Option" section since it only applies to PostgreSQL <= 9.6, which will soon be EOL. Since we no longer build the user guide for PostgreSQL < 10 this section was no longer being tested. The stop-auto option is still documented in the reference.
Move the "Fast Start Option" to "Quick Start - Perform Backup". This is a commonly-used option so it makes sense to mention it earlier. This also makes the backups run more quickly. In the worst case, backups in "Quick Start - Perform Backup" could take minutes to start
Move the "Archive Timeout" section to "Quick Start - Perform Backup" since it is the last section in "Backup".
The user and group were stored in a temp reset mem context so they could get freed if there were enough files to trigger the reset in storageRemoteInfoList().
Allocate user and group in a mem context provided by the caller to prevent them being freed prematurely.
The storageInfoList() test was broken by 54c4eb0c when the remote was changed to use writeable storage. Since the test driver was being injected into the wrong location, new default storage was created and the test effectively did nothing but still "succeeded".
To prevent this type of regression, add checks to ensure the expected test driver is being used and the callback runs the expected number of times.
If the macros are mixed then the debug stack may not be cleaned up correctly. Add variables to ensure that the macros cannot be mixed.
Fix cases where the macros were mixed and add one missing semicolon.
Cleanup all clients inherited from the parent process so they cannot be accidentally used to send messages to servers that do not belong to this process.
We need to do this carefully so that exit commands are not sent and processes are not terminated, so clear the mem context callback on each object before freeing it.
Removed colon from example titles to fix links, fixed test.yml link, and updated the example for the parent/child test process to use the latest macros instead of sleep().
Additional buffers were being allocated for the protocol messages but not being freed.
Most of the allocations were fairly harness, but storageRemoteOpenReadProtocol() and storageWriteRemote() were problematic because they were allocating (but not freeing) buffers equal to the transfer size of the file. Depending on compression, this could be a lot of memory. Though the memory was freed after each file transfer the aggregate of memory used during parallel processing could overwhelm systems with constrained memory.
Also allocate larger initial buffers in storageRemoteOpenReadProtocol() and storageWriteRemote() so a reallocation is not needed.
This makes the generated HTML much more readable in diffs because a single word change will not change a line with potentially many tags.
The output is now slightly larger because of the extra linefeeds.
Options for other repos can cause conflicts and should never be used. Each remote can address exactly one repo or pg cluster.
Also fix an outdated comment.
pg1 was incorrectly used instead of {[host-pg1]} which meant the wrong host name was displayed.
Also, the install block was installing packages to the build host no matter which host was specified.
This function was included in a header but not declared inline, so linker errors happened when the header was included into more than one file.
Because of the setjmp() in TRY_BEGIN() it can't be inlined so put it in a C file.
Also add some missing headers.
There have been intermittent failures on f33 (with coverage) but not on u16 (without coverage).
Reproducing this reliably has been very difficult, so just try increasing the timeouts. This is based on the observation that tests with coverage take longer than tests without, which may lead the f33 tests to fail if CI is running slower than usual.
This will not increase the runtime of the test unless there is an error.
If configure/make has been run in the src path it can conflict with tests, which may require different build options.
Also add a comment when rebuilding for code generation.
