MELVYL CATALOG DATABASE TELNET STATISTICS
Time period: 11/04/00 through 11/10/00
1.0 SUMMARY STATISTICS
_______________________
1.1 Total sessions:
____________________
Location Library Remote Total
________ _______ ______ _____
Berkeley 1,131 2,403 3,534
Davis 1,986 329 2,315
Irvine 739 0 739
Los Angeles 151 673 824
Riverside 598 93 691
San Diego 332 205 537
San Francisco 349 0 349
Santa Barbara 463 410 873
Santa Cruz 389 287 676
LBL 0 161 161
LLL 0 103 103
Other - UC 38 268 306
CSL 0 168 168
CSU n/a 219 219
Other-Non-UC n/a 4,307 4,307
_______ ______ _____
6,176 9,626 15,802
Per hour usage:
Time Sessions Finds Records Displayed
__________ __________ __________ _________________
12-2 a.m. 221 727 5,069
2-4 a.m. 151 775 5,200
4-6 a.m. 184 744 3,942
6-8 a.m. 411 1,150 8,946
8-10 a.m. 1,749 5,398 40,161
10-12 a.m. 2,804 9,514 74,055
12-2 p.m. 2,832 9,447 75,131
2-4 p.m. 3,359 10,246 80,657
4-6 p.m. 2,273 6,740 46,410
6-8 p.m. 806 2,276 17,891
8-10 p.m. 636 1,915 12,337
10-12 p.m. 376 1,205 12,385
__________ __________ __________ _________________
Total: 15,802 50,137 382,184
1.2 FIND commands
__________________
Number of FIND commands issued by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 3,493 6,777 10,270
Davis 6,831 1,060 7,891
Irvine 2,163 0 2,163
Los Angeles 554 1,641 2,195
Riverside 1,965 247 2,212
San Diego 998 373 1,371
San Francisco 602 0 602
Santa Barbara 2,132 790 2,922
Santa Cruz 1,443 992 2,435
LBL 0 291 291
LLL 0 266 266
Other - UC 11 706 717
CSL 0 225 225
CSU n/a 983 983
Other-Non-UC n/a 15,594 15,594
_______ ______ _____
20,192 29,945 50,137
1.3 Records Displayed
______________________
Number of Records Displayed by location:
Location Library Remote Total
________ _______ ______ _____
Berkeley 25,217 56,268 81,485
Davis 42,890 6,332 49,222
Irvine 15,797 0 15,797
Los Angeles 5,771 11,546 17,317
Riverside 14,436 3,006 17,442
San Diego 7,362 4,157 11,519
San Francisco 3,325 0 3,325
Santa Barbara 14,423 8,255 22,678
Santa Cruz 7,754 6,370 14,124
LBL 0 3,113 3,113
LLL 0 1,851 1,851
Other - UC 30 7,265 7,295
CSL 0 1,404 1,404
CSU n/a 8,340 8,340
Other-Non-UC n/a 127,272 127,272
_______ ______ _____
137,005 245,179 382,184
1.4 Response time
__________________
Search response time from receipt of command at
DLA until transmission of response:
Average in seconds 0.7
Standard deviation in seconds 2.7
Display response time from receipt of command at
DLA until transmission of a complete screen:
Average in seconds 0.3
Standard deviation in seconds 0.4
2.0 COMMAND mode statistics:
____________________________
Median session length (minutes:seconds) 8:15
Average session length (minutes:seconds) 13:03
Longest session recorded (minutes:seconds) 803:15
Average number of searches completed per session 3.1
Retrievals per search - median 2.0
Retrievals per search - average 71.5
Retrievals per search - standard deviation 785.3
Percent of searches completed with 0 results 27.8%
Percent of searches entered that are long 4.0%
Percent of long searches completed
(includes partial results) 56.8%
Commands entered, by type, excluding errors:
Total Percentage
FIND 48,558 35.1%
DISPLAY (excluding automatic displays) 43,203 31.2%
ACFIND 35 0.0%
BROWSE 340 0.2%
SELECT 305 0.2%
HELP 1,638 1.2%
EXPLAIN 1,356 1.0%
SET/RESET 3,641 2.6%
SHOW 487 0.4%
AT 2,607 1.9%
ADD ON (AND, OR, AND NOT) 1,498 1.1%
LOGON or LOGOFF 25,707 18.6%
COMMENT 32 0.0%
SAVE 1,372 1.0%
USE 1,165 0.8%
OTHER 6,491 4.7%
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 7,130 14.1% 1,680 23.6% 12 114.3 896.4
AUTHOR 2,290 4.5% 534 23.3% 13 108.9 347.2
CORPORATE AUTH 413 0.8% 155 37.5% 22 665.8 2643.8
EXACT CA 11 0.0% 6 54.5% 8 2451.8 5461.2
TITLE WORD 11,429 22.7% 3,698 32.4% 5 44.2 346.7
EXACT TITLE 6,883 13.7% 2,006 29.1% 2 29.0 373.8
TITLE -> TW 1,324 2.6% 339 25.6% 8 55.5 241.4
TITLE -> XT 1,740 3.5% 804 46.2% 1 13.6 106.2
SUBJECT 4,095 8.1% 1,639 40.0% 46 403.9 1640.2
EXACT SUBJECT 227 0.5% 78 34.4% 89 482.6 1054.1
PERIODICAL 8,385 16.6% 1,656 19.7% 5 98.6 1394.9
EXACT PE 3,071 6.1% 447 14.6% 2 32.1 480.6
RPE 2 0.0% 2 100% 0 0.0 0.0
XRP 2 0.0% 0 0.0% 45 45.0 46.7
COMMENTS 0 0.0% 0 0.0% 0 0.0 0.0
LANGUAGE 182 0.4% 31 17.0% 57 255.5 1170.9
DATE 821 1.6% 191 23.3% 4 88.6 476.9
FORM 496 1.0% 118 23.8% 15 242.2 1345.2
NUMBER* 192 0.4% 57 29.7% 2 16.7 76.3
MUSIC* 9 0.0% 4 44.4% 1,131 702.6 587.9
SERIES 946 1.9% 301 31.8% 3 81.4 664.0
UNIFORM TITLE 13 0.0% 5 38.5% 65 893.9 1450.2
Other indexes 763 1.5% 382 50.1% 1 11.5 110.5
* 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 2,568 5.4% 724 28.2% 4 108.6 777.9
Single 45,114 94.6% 12,655 28.1% 5 98.7 932.2
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 81 25.8% 13 16.0% 5 29.4 54.2
CORPORATE AUTH 1 0.3% 0 0.0% 10 10.0 0.0
EXACT CA 0 0.0% 0 0.0% 0 0.0 0.0
SUBJECT 201 64.0% 34 16.9% 55 114.8 167.4
EXACT SUBJECT 28 8.9% 6 21.4% 8 135.5 286.7
UNIFORM TITLE 1 0.3% 1 100% 0 0.0 0.0
SERIES 2 0.6% 0 0.0% 3 3.0 0.0
By number of indexes:
Multiple 0 0.0% 0 0.0% 0 0.0 0.0
Single 326 100% 58 17.8% 24 90.5 162.5
DISPLAY commands, by type, excluding automatic displays:
REVIEW 10.1%
BRIEF 69.6%
LONG 10.3%
MARC 2.9%
FIELDS 2.9%
TAG 2.0%
PERIODICALS 0.0%
COMMENTS 0.0%
Other (includes BROWSE, ACFIND) 2.1%
3.0 Error, EXPLAIN and HELP statistics
__________________________________________________________
Percent of commands that contained errors 8.6%
Ten most frequent errors:
1. First word of command is invalid 28.8%
2. NS command - no next screen 26.5%
3. FIND command with invalid index name 13.5%
4. DISPLAY command contains invalid word 3.6%
5. Search term missing from search command 2.7%
6. KW search in database w/o KW index 2.5%
7. PS command - no previous screen 2.4%
8. Valid command at an inappropriate time 1.8%
9. DISPLAY command - no FIND results 1.7%
10. Index invalid in current database 1.4%
11. All others 15.3%
Ten most frequent EXPLAIN requests:
1. GUIDE 27.9%
2. FIND 14.5%
3. INDEXES 7.1%
4. COMMAND WORDS 6.9%
5. PASSWORDS 4.6%
6. Unrecognized term 4.3%
7. DISPLAY 3.2%
8. LOCATE (PE DB) 2.4%
9. DATABASES 2.2%
10. CATALOG 1.8%
11. All others 25.2%
Ten most frequent HELP situations:
1. Command mode selected from Welcome 20.7%
2. First word of command is invalid 14.0%
3. FIND command with invalid index name 12.8%
4. DISPLAY command - middle of >1 screen 4.0%
5. DISPLAY command-first of >1 screen 2.7%
6. FIND command retrieves >1 book 2.6%
7. DISPLAY command-complete in one screen 2.6%
8. DISPLAY command - last of >1 screen 2.5%
9. NS command - no next screen 2.5%
10. SU search with zero results 2.4%
11. All others 33.2%
Ten most frequent SHOW requests:
1. TIME 32.5%
2. HISTORY 28.1%
3. SEARCH 14.3%
4. GLOSSARY 10.1%
5. SETTINGS 2.1%
6. DATABASE NEWS 1.3%
7. MEDLINE NEWS 1.3%
8. INSPEC LOADING STATISTICS 1.1%
9. MAIL STATUS 1.1%
10. Z39.50 NEWS 0.6%
11. All others 7.6%
CATmm/dd cat MELVYL CATALOG DATABASE TELNET STATISTICS (weekly)