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[feature] simpler cache size configuration (#2051)

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* add automatic cache max size generation based on ratios of a singular fixed memory target

Signed-off-by: kim <grufwub@gmail.com>

* remove now-unused cache max-size config variables

Signed-off-by: kim <grufwub@gmail.com>

* slight ratio tweak

Signed-off-by: kim <grufwub@gmail.com>

* remove unused visibility config var

Signed-off-by: kim <grufwub@gmail.com>

* add secret little ratio config trick

Signed-off-by: kim <grufwub@gmail.com>

* fixed a word

Signed-off-by: kim <grufwub@gmail.com>

* update cache library to remove use of TTL in result caches + slice cache

Signed-off-by: kim <grufwub@gmail.com>

* update other cache usages to use correct interface

Signed-off-by: kim <grufwub@gmail.com>

* update example config to explain the cache memory target

Signed-off-by: kim <grufwub@gmail.com>

* update env parsing test with new config values

Signed-off-by: kim <grufwub@gmail.com>

* do some ratio twiddling

Signed-off-by: kim <grufwub@gmail.com>

* add missing header

* update envparsing with latest defaults

Signed-off-by: kim <grufwub@gmail.com>

* update size calculations to take into account result cache, simple cache and extra map overheads

Signed-off-by: kim <grufwub@gmail.com>

* tweak the ratios some more

Signed-off-by: kim <grufwub@gmail.com>

* more nan rampaging

Signed-off-by: kim <grufwub@gmail.com>

* fix envparsing script

Signed-off-by: kim <grufwub@gmail.com>

* update cache library, add sweep function to keep caches trim

Signed-off-by: kim <grufwub@gmail.com>

* sweep caches once a minute

Signed-off-by: kim <grufwub@gmail.com>

* add a regular job to sweep caches and keep under 80% utilisation

Signed-off-by: kim <grufwub@gmail.com>

* remove dead code

Signed-off-by: kim <grufwub@gmail.com>

* add new size library used to libraries section of readme

Signed-off-by: kim <grufwub@gmail.com>

* add better explanations for the mem-ratio numbers

Signed-off-by: kim <grufwub@gmail.com>

* update go-cache

Signed-off-by: kim <grufwub@gmail.com>

* library version bump

Signed-off-by: kim <grufwub@gmail.com>

* update cache.result{} size model estimation

Signed-off-by: kim <grufwub@gmail.com>

---------

Signed-off-by: kim <grufwub@gmail.com>
This commit is contained in:
kim 2023-08-03 10:34:35 +01:00 • committed by GitHub
commit 00adf18c24
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32 changed files with 2115 additions and 2330 deletions
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22
internal/cache/util.go vendored
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@ -20,10 +20,8 @@ package cache
import (
"database/sql"
"errors"
"fmt"
"time"
"codeberg.org/gruf/go-cache/v3/result"
errorsv2 "codeberg.org/gruf/go-errors/v2"
"github.com/superseriousbusiness/gotosocial/internal/db"
"github.com/superseriousbusiness/gotosocial/internal/log"
@ -56,26 +54,6 @@ func (*nocopy) Lock() {}
func (*nocopy) Unlock() {}
// tryStart will attempt to start the given cache only if sweep duration > 0 (sweeping is enabled).
func tryStart[ValueType any](cache *result.Cache[ValueType], sweep time.Duration) {
if sweep > 0 {
var z ValueType
msg := fmt.Sprintf("starting %T cache", z)
tryUntil(msg, 5, func() bool {
return cache.Start(sweep)
})
}
}
// tryStop will attempt to stop the given cache only if sweep duration > 0 (sweeping is enabled).
func tryStop[ValueType any](cache *result.Cache[ValueType], sweep time.Duration) {
if sweep > 0 {
var z ValueType
msg := fmt.Sprintf("stopping %T cache", z)
tryUntil(msg, 5, cache.Stop)
}
}
// tryUntil will attempt to call 'do' for 'count' attempts, before panicking with 'msg'.
func tryUntil(msg string, count int, do func() bool) {
for i := 0; i < count; i++ {