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35b3fbd90c
Freeze time during execution of scripts and all other commands. This means that a key is either expired or not, and doesn't change state during a script execution. resolves #10182 This PR try to add a new `commandTimeSnapshot` function. The function logic is extracted from `keyIsExpired`, but the related calls to `fixed_time_expire` and `mstime()` are removed, see below. In commands, we will avoid calling `mstime()` multiple times and just use the one that sampled in call. The background is, e.g. using `PEXPIRE 1` with valgrind sometimes result in the key being deleted rather than expired. The reason is that both `PEXPIRE` command and `checkAlreadyExpired` call `mstime()` separately. There are other more important changes in this PR: 1. Eliminate `fixed_time_expire`, it is no longer needed. When we want to sample time we should always use a time snapshot. We will use `in_nested_call` instead to update the cached time in `call`. 2. Move the call for `updateCachedTime` from `serverCron` to `afterSleep`. Now `commandTimeSnapshot` will always return the sample time, the `lookupKeyReadWithFlags` call in `getNodeByQuery` will get a outdated cached time (because `processCommand` is out of the `call` context). We put the call to `updateCachedTime` in `aftersleep`. 3. Cache the time each time the module lock Redis. Call `updateCachedTime` in `moduleGILAfterLock`, affecting `RM_ThreadSafeContextLock` and `RM_ThreadSafeContextTryLock` Currently the commandTimeSnapshot change affects the following TTL commands: - SET EX / SET PX - EXPIRE / PEXPIRE - SETEX / PSETEX - GETEX EX / GETEX PX - TTL / PTTL - EXPIRETIME / PEXPIRETIME - RESTORE key TTL And other commands just use the cached mstime (including TIME). This is considered to be a breaking change since it can break a script that uses a loop to wait for a key to expire. |
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| .. | ||
| cluster | ||
| moduleapi | ||
| type | ||
| acl-v2.tcl | ||
| acl.tcl | ||
| aofrw.tcl | ||
| auth.tcl | ||
| bitfield.tcl | ||
| bitops.tcl | ||
| client-eviction.tcl | ||
| dump.tcl | ||
| expire.tcl | ||
| functions.tcl | ||
| geo.tcl | ||
| hyperloglog.tcl | ||
| info-command.tcl | ||
| info.tcl | ||
| introspection-2.tcl | ||
| introspection.tcl | ||
| keyspace.tcl | ||
| latency-monitor.tcl | ||
| lazyfree.tcl | ||
| limits.tcl | ||
| maxmemory.tcl | ||
| memefficiency.tcl | ||
| multi.tcl | ||
| networking.tcl | ||
| obuf-limits.tcl | ||
| oom-score-adj.tcl | ||
| other.tcl | ||
| pause.tcl | ||
| pendingquerybuf.tcl | ||
| printver.tcl | ||
| protocol.tcl | ||
| pubsub.tcl | ||
| pubsubshard.tcl | ||
| querybuf.tcl | ||
| quit.tcl | ||
| replybufsize.tcl | ||
| scan.tcl | ||
| scripting.tcl | ||
| shutdown.tcl | ||
| slowlog.tcl | ||
| sort.tcl | ||
| tls.tcl | ||
| tracking.tcl | ||
| violations.tcl | ||
| wait.tcl | ||