MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 04/20/02 through 04/26/02
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 647 1,887 2,534
Davis 1,213 145 1,358
Irvine 348 0 348
Los Angeles 7 367 374
Riverside 365 65 430
San Diego 354 106 460
San Francisco 125 0 125
Santa Barbara 242 78 320
Santa Cruz 138 122 260
LBL 0 46 46
LLL 0 55 55
Other - UC 17 214 231
CSL 0 108 108
CSU n/a 127 127
Other-Non-UC n/a 2,960 2,960
_______ ______ _____
3,456 6,280 9,736
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 209 713 5,322
2-4 a.m. 186 521 4,913
4-6 a.m. 179 509 3,976
6-8 a.m. 371 1,133 8,349
8-10 a.m. 1,350 5,241 38,327
10-12 a.m. 2,056 7,985 61,414
12-2 p.m. 1,648 6,791 49,096
2-4 p.m. 1,688 6,555 50,034
4-6 p.m. 1,129 4,598 36,196
6-8 p.m. 388 1,597 11,970
8-10 p.m. 271 794 7,177
10-12 p.m. 261 1,042 10,142
__________ __________ __________ _________________
Total: 9,736 37,479 286,916
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,662 5,752 7,414
Davis 5,601 582 6,183
Irvine 1,596 0 1,596
Los Angeles 9 696 705
Riverside 2,422 204 2,626
San Diego 1,100 489 1,589
San Francisco 476 0 476
Santa Barbara 1,240 185 1,425
Santa Cruz 918 836 1,754
LBL 0 34 34
LLL 0 123 123
Other - UC 24 582 606
CSL 0 104 104
CSU n/a 613 613
Other-Non-UC n/a 12,231 12,231
_______ ______ _____
15,048 22,431 37,479
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 16,158 45,932 62,090
Davis 38,237 3,025 41,262
Irvine 11,307 0 11,307
Los Angeles 107 6,561 6,668
Riverside 12,175 1,337 13,512
San Diego 5,744 2,964 8,708
San Francisco 4,476 0 4,476
Santa Barbara 11,744 1,083 12,827
Santa Cruz 2,965 3,504 6,469
LBL 0 166 166
LLL 0 4,753 4,753
Other - UC 119 7,472 7,591
CSL 0 693 693
CSU n/a 5,699 5,699
Other-Non-UC n/a 100,695 100,695
_______ ______ _____
103,032 183,884 286,916
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.4
Standard deviation in seconds 2.3
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.2
Standard deviation in seconds 0.3
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 11:12
Average session length (minutes:seconds) 15:51
Longest session recorded (minutes:seconds) 1210
Average number of searches completed per session 3.8
Retrievals per search - median 2.0
Retrievals per search - average 59.6
Retrievals per search - standard deviation 918.3
Percent of searches completed with 0 results 27.8%
Percent of searches entered that are long 3.7%
Percent of long searches completed
(includes partial results) 66.2%
Commands entered, by type, excluding errors:
Total Percentage
FIND 36,035 36.6%
DISPLAY (excluding automatic displays) 32,603 33.1%
ACFIND 3 0.0%
BROWSE 236 0.2%
SELECT 218 0.2%
HELP 671 0.7%
EXPLAIN 633 0.6%
SET/RESET 1,963 2.0%
SHOW 188 0.2%
AT 2,414 2.5%
ADD ON (AND, OR, AND NOT) 1,434 1.5%
LOGON or LOGOFF 17,027 17.3%
COMMENT 0 0.0%
SAVE 717 0.7%
USE 586 0.6%
OTHER 3,721 3.8%
FINDs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. FINDs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 5,125 13.5% 1,237 24.1% 10 78.9 336.3
AUTHOR 1,481 3.9% 351 23.7% 11 92.9 391.1
CORPORATE AUTH 342 0.9% 123 36.0% 14 1410.4 9356.2
EXACT CA 28 0.1% 5 17.9% 5 522.6 1850.8
TITLE WORD 7,914 20.9% 2,613 33.0% 5 45.8 490.9
EXACT TITLE 6,542 17.3% 1,913 29.2% 2 20.2 150.1
TITLE -> TW 932 2.5% 236 25.3% 9 79.3 444.3
TITLE -> XT 927 2.4% 417 45.0% 2 18.0 143.7
SUBJECT 1,607 4.2% 559 34.8% 49 448.0 1984.8
EXACT SUBJECT 115 0.3% 22 19.1% 82 476.4 1053.6
PERIODICAL 6,961 18.4% 1,594 22.9% 4 75.3 957.6
EXACT PE 2,808 7.4% 474 16.9% 3 19.7 177.2
RPE 0 0.0% 0 0.0% 0 0.0 0.0
XRP 2 0.0% 0 0.0% 9 9.0 4.2
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 68 0.2% 12 17.6% 70 282.2 509.6
DATE 382 1.0% 85 22.3% 6 109.0 377.9
FORM 637 1.7% 210 33.0% 11 113.4 359.8
NUMBER* 28 0.1% 12 42.9% 3 2793.8 7619.1
MUSIC* 16 0.0% 6 37.5% 18 60.7 106.4
SERIES 975 2.6% 299 30.7% 4 80.9 404.0
UNIFORM TITLE 24 0.1% 16 66.7% 2 32.3 68.7
Other indexes 997 2.6% 430 43.1% 1 16.1 112.5
* Number indexes include REPORT NUMBER STOCK NUMBER,
GOVERNMENT DOCUMENTS, and GPO ITEM NUMBER;
Music indexes include MUSICAL KEY, MUSIC PUBLISHER, and THEMATIC
By number of indexes:
Multiple 2,152 6.1% 636 29.6% 4 83.5 900.4
Single 33,414 93.9% 9,302 27.8% 4 84.1 1112.6
BROWSEs completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. BROs No. Index Median Avg. Dev.
______ ______ ______ _______ ______ _______ _______
By index:
PERSONAL AUTH 7 3.3% 1 14.3% 7 18.0 26.7
CORPORATE AUTH 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 172 82.3% 42 24.4% 70 292.3 596.1
EXACT SUBJECT 27 12.9% 0 0.0% 44 110.4 111.1
UNIFORM TITLE 0 0.0% 0 0.0% 0 0.0 0.0
SERIES 3 1.4% 2 66.7% 39 39.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 222 100% 47 21.2% 68 235.7 524.6
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.9%
BRIEF 68.2%
LONG 8.8%
MARC 4.0%
FIELDS 2.8%
TAG 2.6%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.7%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 7.2%
Ten most frequent errors:
1. NS command - no next screen 33.1%
2. First word of command is invalid 28.1%
3. FIND command with invalid index name 12.4%
4. DISPLAY command contains invalid word 4.6%
5. Search term missing from search command 2.5%
6. PS command - no previous screen 2.0%
7. Valid command at an inappropriate time 1.6%
8. DISPLAY command - no FIND results 1.4%
9. KW search in database w/o KW index 1.2%
10. Command contains escape or arrow key 0.9%
11. All others 12.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 31.4%
2. FIND 10.3%
3. INDEXES 7.6%
4. COMMAND WORDS 6.3%
5. Unrecognized term 5.4%
6. PASSWORDS 3.3%
7. CATALOG 1.9%
8. LOCATE (PE DB) 1.7%
9. DISPLAY 1.6%
10. DATABASES 1.6%
11. All others 28.9%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 23.9%
2. First word of command is invalid 13.9%
3. FIND command with invalid index name 13.8%
4. DISPLAY command-first of >1 screen 3.5%
5. DISPLAY command - middle of >1 screen 3.2%
6. NS command - no next screen 2.8%
7. TW search with zero results 2.4%
8. F/BR with index invalid in current DB 2.1%
9. FIND command retrieves >1 book 2.1%
10. 3 HELP commands issued from same code 1.9%
11. All others 30.3%
Ten most frequent SHOW requests:
1. HISTORY 43.0%
2. SEARCH 15.1%
3. GLOSSARY 8.9%
4. SETTINGS 7.3%
5. DATABASE NEWS 3.4%
6. STATISTICS 2.8%
7. NEWS 2.2%
8. 2292 1.7%
9. DATABASES 1.7%
10. MELVYL 1.1%
11. All others 12.8%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)