to a single statement.
---
Bug#24795: SHOW PROFILE
Profiling is only partially functional on some architectures. Where
there is no getrusage() system call, presently Null values are
returned where it would be required. Notably, Windows needs some love
applied to make it as useful.
Syntax this adds:
SHOW PROFILES
SHOW PROFILE [types] [FOR QUERY n] [OFFSET n] [LIMIT n]
where "n" is an integer
and "types" is zero or many (comma-separated) of
"CPU"
"MEMORY" (not presently supported)
"BLOCK IO"
"CONTEXT SWITCHES"
"PAGE FAULTS"
"IPC"
"SWAPS"
"SOURCE"
"ALL"
It also adds a session variable (boolean) "profiling", set to "no"
by default, and (integer) profiling_history_size, set to 15 by
default.
This patch abstracts setting THDs' "proc_info" behind a macro that
can be used as a hook into the profiling code when profiling
support is compiled in. All future code in this line should use
that mechanism for setting thd->proc_info.
---
Tests are now set to omit the statistics.
---
Adds an Information_schema table, "profiling" for access to
"show profile" data.
---
Merge zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-community-3--bug24795
into zippy.cornsilk.net:/home/cmiller/work/mysql/mysql-5.0-community
---
Fix merge problems.
---
Fixed one bug in the query_source being NULL.
Updated test results.
---
Include more thorough profiling tests.
Improve support for prepared statements.
Use session-specific query IDs, starting at zero.
---
Selecting from I_S.profiling is no longer quashed in profiling, as
requested by Giuseppe.
Limit the size of captured query text.
No longer log queries that are zero length.
Showstopper and regression against 5.0.24.
Previously, we ignored seek() errors (see Bug#22828) and let seek()s
against pipes fail. Now, since we check that a seek didn't fail,
and return without reading, this bug popped up.
This restores the behavior for file-ish objects that could never be
seek()ed.
Thirty five seconds is entirely too short of a period to wait for a server
to exit. Instead, make a valliant effort to make sure it exits, and only
give up after a very long period (arbitrarily chosen as 15 minutes).
In addition, if we're being asked to restart the server, then don't try
to start again if trying to stop the server failed.
---
Return zero by default, when the script exits.
---
Set return-/exit-value based on whether we successfully dealt with the
PID-file.
---
Don't wait that long if the program we're waiting on exits. It
should only exit if the server is not going to be started.
variables
Bits higher than 2**31 were impossible to set on THD::options. It's
probably a remnant from a time when options was a 32-bit integer.
Now, use unsigned long-long constants and variables to set and clear
THD::options.
---
Pulled comments back to column 49.
Provide the number of seconds since flush as a new status variable
named "Uptime_since_flush_status".
---
Override the post-flush value, as a second could pass between the two
statements.
